Free Developer Tools That
Never Touch a Server
250+ browser-based utilities — format, encode, generate, convert. Zero sign-up. Zero tracking. Your data stays on your device.
Randomness
Roll dice, flip coins, shuffle lists, pick names, and generate random data of every kind.
Yes/No Randomizer
Get a random Yes or No answer instantly. Simple decision maker powered by cryptographic randomness. Free, runs 100% in your browser.
Random Number Generator
Generate cryptographically secure random numbers within any range. Set min, max, and quantity. Free online tool, 100% client-side.
Random Word Generator
Generate random words for brainstorming, creative writing, word games, or testing. Choose from nouns, adjectives, or verbs. Free, 100% in your browser.
Coin Flip
Flip a virtual coin online with realistic 3D animation. Cryptographically fair 50/50 heads or tails. Free, runs 100% in your browser.
Dice Roller
Roll virtual dice online. Support for D4, D6, D8, D10, D12, D20 with 1-10 dice. Cryptographically fair results with visual animation.
Random Color Generator
Generate random colors with HEX, RGB, and HSL values. Copy color codes instantly. Color history for comparison. Free, runs in your browser.
Random Letter Generator
Generate random letters instantly. Choose uppercase, lowercase, or both. Batch generation up to 50. Cryptographically secure, runs in your browser.
Random Date Generator
Generate random dates within any date range. Set start and end dates, generate up to 50 random dates. Cryptographically secure, runs in your browser.
List Randomizer
Shuffle and randomize any list of items instantly. Uses Fisher-Yates algorithm with cryptographic randomness. Free, runs 100% in your browser.
Random Name Picker
Pick random names from a list for raffles, giveaways, or classroom activities. Choose how many winners. Cryptographically fair, runs in your browser.
Wheel Spinner
Spin a customizable wheel to make random decisions. Add your own options, watch the animated spin, get a fair result. Free, runs in your browser.
Team Generator
Split a list of people into random teams. Balanced distribution, cryptographically fair. Perfect for classrooms, sports, and group activities.
Random Paragraph Generator
Generate random English paragraphs for testing, design mockups, or creative inspiration. Adjustable count up to 10. Free, runs in your browser.
Fake Identity Generator
Generate fake identities for testing — random names, addresses, emails, phone numbers, dates of birth. Cryptographically random, runs in your browser.
Mock Data Generator
Generate mock test data in JSON or CSV format. Pick columns: name, email, UUID, date, integer, boolean, and more. Free, runs in your browser.
Random IP Generator
Generate random IPv4 and IPv6 addresses for testing. Choose version, count up to 50, exclude private/reserved ranges. Runs in your browser.
Random JSON Generator
Generate random JSON objects with configurable depth, keys, and value types. Perfect for testing parsers, APIs, and database fixtures. Runs in your browser.
Random Port Generator
Generate random port numbers — well-known (0-1023), registered (1024-49151), or dynamic (49152-65535). Pick a range, generate up to 50.
Random Hex Generator
Generate random hexadecimal strings of any length. Lowercase, uppercase, with or without 0x prefix. Cryptographically secure, runs in your browser.
Random String Generator
Generate random strings with custom charsets — uppercase, lowercase, digits, symbols, custom. Length up to 256, batch up to 50. Cryptographically secure.
Random MAC Address Generator
Generate random MAC addresses in IEEE 802 formats — colon, hyphen, dot, or no separator. Locally administered, unicast. Runs in your browser.
Random Country Generator
Generate random countries with flag, capital, population, and continent. Filter by continent. Cryptographically fair, runs in your browser.
Random Animal Generator
Generate random animals with category (mammal, bird, reptile, fish, insect). Educational, fun, perfect for classrooms and games. Runs in your browser.
Random Name Generator
Generate random first and last names. Choose male, female, or any. Batch up to 50 names. Cryptographically fair, runs 100% in your browser.
Random Address Generator
Generate random fake US addresses for testing — street, city, state, ZIP. Plausible but entirely fictional. Cryptographically fair, runs in browser.
Random Phone Number Generator
Generate random phone numbers in US, UK, German, French, or international formats. For testing only — fictional numbers. Runs in your browser.
Random Emoji Generator
Generate random emojis from all categories — smileys, animals, food, objects, symbols. Pick by category. Cryptographically fair, runs in your browser.
Random Gradient Generator
Generate random CSS gradients — linear, radial, conic. Harmonious color combinations, copy ready-to-paste CSS code. Runs in your browser.
Random Avatar Generator
Generate unique geometric avatars from random seeds. Customizable size, shape style, color palette. Download as PNG or SVG. Runs in your browser.
Random Quote Generator
Generate random inspirational, motivational, and famous quotes from authors throughout history. Filter by category. Runs in your browser.
Random Fact Generator
Generate random fun and interesting facts about science, history, animals, and more. Educational, surprising, runs 100% in your browser.
Reaction Tester
Test your reaction time with millisecond precision. Click as fast as possible when the screen turns green. Average and best times tracked locally.
Generators
Create UUIDs, passwords, hashes, random values, and links — powered by Web Crypto.
UUID Generator
Generate UUID v4 (random) and v7 (timestamp) identifiers instantly. Copy with one click. Free, 100% client-side, no data leaves your browser.
Password Generator
Create strong, random passwords in one click — customize length, symbols, and character types. No sign-up, no data sent to servers. 100% browser-based.
Hash Generator
Generate SHA-1, SHA-256, SHA-384, and SHA-512 hashes from any text instantly. Verify data integrity with ease. Free, runs 100% in your browser.
Lorem Ipsum Generator
Generate placeholder text by paragraphs, sentences, or words. Perfect for mockups, wireframes, and layouts. Free, instant, no sign-up.
WhatsApp Link Generator
Generate WhatsApp click-to-chat links with pre-filled messages. Get wa.me links, API links, and HTML embed code. Free, 100% in your browser.
Telegram Link Generator
Generate Telegram links for users, groups, and channels. Get t.me links and HTML embed code instantly. Free, 100% in your browser.
Username Generator
Generate random unique usernames in multiple styles: adjective-noun, word-number, alliterative, and initials. Copy any username with one click. Free, 100% in your browser.
Passphrase Generator
Generate secure random passphrases from a 256-word list using the Web Crypto API. Customize word count, separator, capitalization, and numbers. See entropy estimate. Free, 100% in your browser.
Random Token Generator
Generate cryptographically secure random tokens and API keys in hex, base64, alphanumeric, or URL-safe formats. Free, 100% in your browser.
WiFi Password Generator
Generate strong WiFi passwords compatible with WPA2 and WPA3. Length 8-63 chars, configurable charset, strength indicator. Runs in your browser.
PIN Code Generator
Generate random PIN codes from 4 to 12 digits. Avoid weak patterns like 1234 or 0000. Cryptographically secure, runs in your browser.
Email Signature Generator
Create professional HTML email signatures with avatar, links, and social icons. Live preview, copy HTML or styled. Free, runs in your browser.
RSA Key Pair Generator
Generate RSA public/private key pairs in your browser using Web Crypto. 2048, 3072, or 4096 bits. PEM format. No data leaves your device.
Mnemonic Phrase Generator
Generate cryptographically secure BIP39 mnemonic phrases (12, 15, 18, 21, or 24 words). Recovery words for crypto wallets. Runs locally.
Encoders / Decoders
Encode, decode, and inspect Base64, URLs, JWTs, Morse code, Punycode, and number bases.
Base64 Encoder / Decoder
Encode or decode Base64 in one click — full Unicode support, instant results. No uploads, no servers. Paste your text and get results immediately.
URL Encoder
Paste a URL or text and encode or decode it with percent-encoding instantly. Ideal for query strings, API parameters, and form data. Free, 100% in your browser.
JWT Decoder
Paste a JWT and instantly see the decoded header, payload, and expiration status. No tokens are sent to any server — everything runs in your browser.
Morse Code Converter
Convert text to Morse code and Morse code back to text instantly. Supports letters, numbers, and punctuation. Free, 100% in your browser.
Punycode Converter
Convert between Unicode and Punycode (ACE) for internationalized domain names. Encode/decode IDN domains instantly. Free, 100% in your browser.
Number Base Converter
Convert numbers between binary, octal, decimal, and hexadecimal instantly. Supports large integers. Free, 100% in your browser.
ASCII Table
Browse the complete ASCII table with decimal, hex, octal, binary, and character values. Instant search and one-click copy. Free reference tool.
ROT Cipher
Encode and decode text with ROT13, ROT47, ROT5, ROT18, or custom rotation ciphers. Encrypt and decrypt instantly. Free, 100% in your browser.
Caesar Cipher
Encode and decode text with the Caesar cipher. Shift letters A-Z by any amount (1-25). Encrypt and decrypt instantly. Free, 100% in your browser.
Vigenere Cipher
Encode and decode text with the Vigenere cipher using a keyword. Polyalphabetic substitution encryption and decryption. Free, 100% in your browser.
Base64 Image Encoder
Convert images to Base64 data URIs and decode Base64 strings back to images. Copy as data URI or raw Base64. Free, runs entirely in your browser.
Text to Binary Converter
Convert text to binary (8-bit ASCII) and binary back to text. Supports UTF-8 multibyte characters. Free, runs 100% in your browser.
Hex to Text Converter
Convert hexadecimal to text and text to hex. Supports UTF-8 multibyte characters and 0x prefix. Free, runs 100% in your browser.
HTML Entity Encoder/Decoder
Encode HTML special characters to entities and decode HTML entities back to text. Named (&), decimal (&), or hex (&) format.
Text Tools
Count characters and words, compare text, convert cases, and explore emojis.
Character Counter
Count characters, words, sentences, and paragraphs in real time. Shows reading time and word frequency. Free online tool, no sign-up required.
Word Counter
Count words, sentences, paragraphs, and estimated reading time as you type. Free online tool, no sign-up required. Runs 100% in your browser.
Text Compare
Paste two texts and instantly see every difference highlighted line by line. Perfect for code reviews and document revisions. Free, no sign-up needed.
Case Converter
Convert text to UPPERCASE, lowercase, Title Case, camelCase, PascalCase, snake_case, kebab-case, and Sentence case instantly. Free, 100% in your browser.
Emoji Explorer
Browse and search over 1,000 emojis by category or keyword. Click any emoji to copy it instantly. Free, runs 100% in your browser.
Duplicate Line Remover
Remove duplicate lines from text instantly. Options for case-sensitive matching, whitespace trimming, and sorting. Free, 100% in your browser.
Typing Speed Test
Test your typing speed in WPM (words per minute) with a 60-second timed test. See accuracy and mistake count in real-time. Free, runs 100% in your browser.
Word Frequency Counter
Count word frequency in any text instantly. See the most common words with visual bar charts. Filter by minimum frequency and toggle case sensitivity. Free, 100% in your browser.
Reading Time Estimator
Estimate how long it takes to read any text. Shows word count, character count, reading time, and speaking time. Adjustable words per minute. Free, 100% in your browser.
Text to Speech
Convert text to spoken audio using your browser's built-in voices. Adjust voice, speed, and pitch. Free, runs 100% in your browser.
Markdown Editor
Write Markdown with live HTML preview side-by-side. Auto-saves to your browser. Supports GFM tables, fenced code, task lists. Free, runs in browser.
Online Notepad
A simple online notepad. Auto-saves to your browser, no signup. Distraction-free writing with word and character count. Runs 100% in your browser.
Link Extractor
Extract all URLs from text or HTML. Sort, dedupe, filter by domain. Free, runs 100% in your browser. Perfect for content audits and link analysis.
Text Cleaner
Clean text — collapse whitespace, trim lines, remove invisible characters, fix line endings, normalize quotes. Free, runs in your browser.
String / Text Replacer
Find and replace text with literal or regex patterns. Multi-pattern, case-insensitive, whole-word options. Runs 100% in your browser.
Diacritic Remover
Remove accents and diacritics from text. Convert café to cafe, naïve to naive. Unicode NFD normalization. Runs in your browser.
Markdown Table Generator
Build Markdown tables visually. Add rows and columns, set alignment, paste from CSV/TSV. Live Markdown output. Runs in your browser.
Converters
Convert between formats: timestamps, colors, CSV/JSON, CSS units, images, and more.
Timestamp Converter
Paste a Unix timestamp and see the human-readable date instantly, or pick a date to get its timestamp. Supports seconds and milliseconds. Free, 100% client-side.
Color Converter
Pick a color or paste a HEX, RGB, or HSL value and see all formats update instantly. Free online tool for developers and designers.
CSV ↔ JSON Converter
Paste CSV or JSON data and convert between formats in one click. Supports custom delimiters. Free, private — your data never leaves your browser.
JSON ↔ YAML Converter
Convert between JSON and YAML instantly. Paste JSON to get clean YAML, or paste YAML to get formatted JSON. Configurable indentation. Free, 100% in your browser.
CSS Units Converter
Type a value in px, rem, em, or vw and see all equivalents instantly. Configurable base font size and viewport width. Free, essential for responsive CSS.
Temperature Converter
Convert temperatures between Celsius, Fahrenheit, and Kelvin instantly. Live results as you type. Free, runs 100% in your browser.
Length Converter
Convert between length and distance units instantly: millimeters, centimeters, meters, kilometers, inches, feet, yards, miles, and nautical miles. Free, 100% in your browser.
Image Converter
Convert images between JPG, PNG, WebP, and ICO formats in your browser. Adjust quality, preview results, see file size savings. Free, 100% client-side.
XML ↔ JSON Converter
Convert between XML and JSON instantly. Handles attributes, nested elements, and arrays. Configurable indentation. Free, 100% in your browser.
Markdown ↔ HTML Converter
Convert between Markdown and HTML instantly. Supports headings, bold, italic, links, lists, code blocks, and more. Free, 100% in your browser.
Image Compressor
Compress and resize images in your browser. Convert between JPEG, PNG, and WebP formats. Adjust quality and see size savings instantly. Free, 100% client-side.
Weight Converter
Convert between weight and mass units instantly: milligrams, grams, kilograms, tonnes, ounces, pounds, and stones. Free, 100% in your browser.
Speed Converter
Convert between speed units instantly: m/s, km/h, mph, knots, ft/s, and Mach. Free, 100% in your browser.
Volume Converter
Convert between volume units instantly: milliliters, liters, cubic meters, teaspoons, tablespoons, fluid ounces, cups, pints, and gallons. Free, 100% in your browser.
Area Converter
Convert between area units instantly: mm², cm², m², km², hectares, in², ft², yd², acres, and mi². Free, 100% in your browser.
Data Units Converter
Convert between digital storage units: bits, bytes, KB, MB, GB, TB, PB, and binary units (KiB, MiB, GiB, TiB). Free, 100% in your browser.
Energy Converter
Convert between energy units instantly: joules, kilojoules, calories, kilocalories, watt-hours, kilowatt-hours, BTU, and electronvolts. Free, 100% in your browser.
Pressure Converter
Convert between pressure units instantly: Pascal, kilopascal, bar, atmosphere, PSI, mmHg, inHg, and torr. Free, 100% in your browser.
Angle Converter
Convert between angle units instantly: degrees, radians, gradians, arcminutes, arcseconds, turns, and milliradians. Free, 100% in your browser.
Frequency Converter
Convert between frequency units instantly: Hertz, kilohertz, megahertz, gigahertz, terahertz, RPM, and radians per second. Free, 100% in your browser.
Power Converter
Convert between power units instantly: watts, kilowatts, megawatts, horsepower, BTU/h, calories per second, and foot-pounds per second. Free, 100% in your browser.
Pace Converter
Convert between running pace and speed units: min/km, min/mi, km/h, mph, m/s, and ft/s. Perfect for runners and athletes. Free, 100% in your browser.
Number to Words Converter
Convert numbers to written English words instantly. Supports integers, decimals, and negative numbers up to trillions. Free, 100% in your browser.
Voltage Converter
Convert between voltage units instantly: volts, millivolts, kilovolts, megavolts, and microvolts. Free, accurate, and 100% in your browser.
Current Converter
Convert between electric current units instantly: amperes, milliamperes, microamperes, and kiloamperes. Free, accurate, 100% in your browser.
Illuminance Converter
Convert between illuminance units instantly: lux, foot-candle, phot, nox, and kilolux. Free, accurate, and 100% in your browser.
JSON to TypeScript Converter
Convert JSON objects to TypeScript interfaces and types instantly. Handles nested objects, arrays, and optional fields. Free online tool, 100% in your browser.
HTML to JSX Converter
Convert HTML to JSX for React components instantly. Transforms class to className, style strings to objects, and self-closes void elements. Free online tool.
JSON to Go Converter
Convert JSON to Go structs with proper field names, types, and json tags. Handles nested objects and arrays. Free online tool, 100% in your browser.
Image Resizer
Resize images by exact dimensions or percentage while keeping the aspect ratio. Export as PNG, JPEG, or WebP. Free, runs entirely in your browser.
Image Cropper
Crop images with freeform selection or preset aspect ratios like 1:1, 4:3, and 16:9. Download the cropped result as PNG. Free, runs in your browser.
SVG to PNG Converter
Convert SVG files to high-quality PNG, JPEG, or WebP at any scale. Upload or paste SVG markup, choose output format and size. Free, browser-based.
Roman Numeral Converter
Convert Roman numerals to Arabic numbers and back. Supports 1-3999. Free, runs 100% in your browser.
HTML to Text Converter
Strip HTML tags and extract plain text from HTML markup. Preserves line breaks, lists, and link URLs. Free, runs in your browser.
JSON to HTML Table
Convert a JSON array of objects into a styled HTML table. Live preview, copy HTML or styled. Free, runs 100% in your browser.
JSON5 Converter
Convert JSON5 (with comments, trailing commas, single quotes, unquoted keys) into standard JSON. Free, runs 100% in your browser.
JSONC to JSON Converter
Strip comments from JSONC (JSON with comments) to produce valid JSON. Used by VS Code and many config files. Runs in your browser.
CSV to SQL Converter
Convert CSV data to SQL — generate CREATE TABLE schema and INSERT statements. Choose dialect (MySQL, Postgres, SQLite). Runs in your browser.
SRT / WebVTT Converter
Convert subtitle files between SRT and WebVTT formats. Fix timestamps, preview cues, download. Runs 100% in your browser.
JSON to XML Converter
Convert JSON to XML and XML back to JSON. Configurable root element, attribute prefix, indentation. Runs 100% in your browser.
TSV / CSV Converter
Convert between tab-separated (TSV) and comma-separated (CSV) values. Quoting, header row, custom delimiters. Runs in your browser.
JSON to PHP Converter
Convert JSON to a PHP associative array literal. Configurable indentation, short array syntax, semicolon. Runs in your browser.
Calculators
Calculate percentages, dates, mortgages, BMI, discounts, and track time.
Percentage Calculator
Calculate percentages instantly: find X% of a number, what percentage X is of Y, or the percentage change between two values. Free, 100% in your browser.
Discount Calculator
Calculate discounts instantly: find savings from a percentage off, or find the original price from a sale price. Free, 100% in your browser.
VAT Calculator
Calculate VAT instantly: add VAT to a net price or remove VAT from a gross price. Supports preset rates from 0% to 27%. Free, 100% in your browser.
Mortgage Calculator
Calculate monthly mortgage payments, total payment, and total interest. Supports annuity and differentiated payment methods. Free, 100% in your browser.
BMI Calculator
Calculate your Body Mass Index (BMI) from weight and height. See your BMI category — underweight, normal, overweight, or obese. Free, 100% in your browser.
Age Calculator
Calculate your exact age in years, months, and days from your birthdate. Find out days until your next birthday. Free, 100% in your browser.
Date Calculator
Calculate the exact difference between two dates in years, months, days, hours, minutes, and total units. Free, runs 100% in your browser.
Stopwatch
Free online stopwatch with lap timing and split times. Millisecond precision. Export lap data as CSV or JSON. Runs 100% in your browser.
Countdown Timer
Free online countdown timer with alarm sound. Set hours, minutes, seconds or use quick presets. Visual and audio alert when done. 100% in your browser.
Timezone Converter
Convert time between any timezones instantly. Supports all major world timezones with UTC offset display. Auto-detects your local timezone. Free, 100% in your browser.
Download Time Calculator
Calculate how long a file download will take based on file size and connection speed. Includes presets for 3G, 4G, 5G, DSL, fiber, and gigabit. Free, 100% in your browser.
Salary / Hourly Calculator
Convert between yearly salary, monthly, weekly, daily, and hourly pay rates. Adjustable hours per week and weeks per year. Free, 100% in your browser.
Workday Calculator
Calculate working days between two dates or add/subtract business days from a date. Excludes weekends automatically. Free, runs 100% in your browser.
Leap Year Detector
Check if any year is a leap year. See days in February, divisibility rules, and the next and previous leap years. Free, runs 100% in your browser.
GCD & LCM Calculator
Calculate the Greatest Common Divisor (GCD) and Least Common Multiple (LCM) of two or more numbers with step-by-step Euclidean algorithm. Free, 100% in your browser.
Prime Number Checker
Check if any number is prime, see its prime factorization, and find nearby primes. Uses trial division up to the square root. Free, 100% in your browser.
Compound Interest Calculator
Calculate compound interest with flexible compounding periods and monthly contributions. Interactive chart included. Free, 100% in your browser.
Tip Calculator
Calculate tip amount and split the bill among multiple people instantly. Supports custom tip percentages. Free, 100% in your browser.
Scientific Calculator
Full scientific calculator with trig, logarithms, exponents, memory, and keyboard support. Free, runs entirely in your browser — no sign-up needed.
GPA Calculator
Calculate your GPA from courses, grades, and credit hours. Supports 4.0 and 5.0 grading scales. Free, instant, runs 100% in your browser.
Calorie Calculator
Estimate daily calorie needs using Harris-Benedict and Mifflin-St Jeor equations. Adjust for activity level and goals. Free, 100% in your browser.
Fuel Cost Calculator
Calculate trip fuel cost from distance, fuel efficiency, and fuel price. Supports metric and imperial units. Free, 100% in your browser.
Electricity Cost Calculator
Calculate electricity cost from wattage, daily usage hours, and rate per kWh. See daily, weekly, monthly, and yearly costs. Free, 100% in your browser.
Margin Calculator
Calculate profit margin and markup from cost and revenue. Switch between margin and markup modes instantly. Free, runs 100% in your browser.
Ratio Calculator
Solve proportions (A:B = C:D) for any missing value and simplify ratios to lowest terms. Free, instant, runs entirely in your browser.
Pomodoro Timer
Free Pomodoro timer with 25-minute focus and 5-minute break cycles. Customizable durations, sound alerts, session counter. Runs in your browser.
Aspect Ratio Calculator
Calculate aspect ratios and proportional dimensions for images, videos, and screens. Lock W:H, find missing dimension. Runs in your browser.
DPI Calculator
Calculate DPI/PPI from image pixels and physical print size. Convert between dots per inch, pixels, inches, and millimeters. Runs in your browser.
Speech Time Calculator
Calculate how long it takes to read a speech aloud. Adjust for slow, normal, or fast pace. Word count and minute estimate. Runs in your browser.
World Clock
View live time in cities around the world. Add and remove zones, 12/24-hour format, dark mode. No signup. Runs in your browser.
Timezone Meeting Planner
Schedule meetings across time zones. Add participants, see overlapping working hours, pick the best slot. Runs 100% in your browser.
Upload Time Calculator
Calculate how long it takes to upload a file at a given speed. Mbps to MB, account for protocol overhead. Runs in your browser.
Sunrise / Sunset Calculator
Calculate sunrise, sunset, golden hour, and twilight times for any latitude/longitude and date. Runs 100% in your browser.
Web Development
Test regex, minify code, format JSON, parse cron, and generate meta tags and .htaccess files.
Meta Tags Generator
Fill in your page details and get copy-paste ready meta tags for SEO, Open Graph, and Twitter Cards. Free, runs entirely in your browser.
.htaccess Generator
Toggle the options you need and get a ready-to-deploy .htaccess file for Apache. HTTPS redirects, caching, gzip, and more. Free, no sign-up.
Regex Tester
Test regular expressions in real time with match highlighting and capture group display. Free online regex debugger, runs 100% in your browser.
Code Minifier
Paste your HTML, CSS, or JavaScript and get a minified version instantly. See exact size savings. Free, 100% client-side — no data sent anywhere.
JSON Formatter
Format, validate, and minify JSON with syntax error detection and line numbers. Free online JSON beautifier and validator, 100% in your browser.
CRON Parser
Parse and explain CRON expressions. See the next 5 execution times and get a human-readable description of any cron schedule. Free, 100% in your browser.
Screen Size Detector
Detect your viewport size and screen resolution instantly. See dimensions update in real-time as you resize the browser window. Free, 100% in your browser.
Password Strength Checker
Check password strength instantly: entropy analysis, crack time estimate, pattern detection, and composition breakdown. Free, 100% in your browser — your password never leaves your device.
URL Parser
Parse any URL into its components: protocol, host, port, path, query parameters, and fragment. Analyze URL structure instantly. Free, 100% in your browser.
IBAN Validator
Validate IBAN numbers instantly with MOD-97 checksum verification. See country code, check digits, and BBAN breakdown. Free, 100% in your browser.
JSON Validator
Validate JSON syntax instantly with detailed error messages. Format, minify, and inspect JSON structure with key/array counts and depth analysis. Free, 100% in your browser.
IP Address Parser
Parse and analyze IP addresses instantly. Supports IPv4 and IPv6 with binary, decimal, hex representations, class detection, and scope identification. Free, 100% in your browser.
Subnet Calculator
Calculate subnet details from CIDR notation: network address, broadcast, subnet mask, wildcard, host range, and total usable hosts. Free, 100% in your browser.
User Agent Parser
Parse user agent strings to detect browser, engine, operating system, device type, and bot status. Supports all major browsers and platforms. Free, 100% in your browser.
HTTP Status Code Explorer
Browse all HTTP status codes with descriptions. Filter by category (1xx-5xx), search by code or name. Quick reference for web developers. Free, 100% in your browser.
Curl Builder
Build curl commands visually with method, URL, headers, body, and options. Copy the generated command to your clipboard. Free, 100% in your browser.
EXIF Reader
Read EXIF metadata from JPEG images. See camera model, exposure, GPS coordinates, date taken, and more. Free, 100% in your browser.
Phone Number Parser
Parse, validate, and format phone numbers in international, national, and E.164 formats. Supports 40+ countries. Free, 100% in your browser.
ISBN Validator
Validate ISBN-10 and ISBN-13 numbers with check digit verification. See formatted ISBN, check digit, and conversion between formats. Free, 100% in your browser.
Email Validator
Validate email address syntax according to RFC 5321/5322. Check local part, domain, and TLD. Free, 100% in your browser.
JSON Tree Viewer
Visualize JSON data as an interactive collapsible tree. Expand, collapse, and navigate JSON objects and arrays. Copy JSON paths. Free, 100% in your browser.
chmod Generator
Generate Unix chmod permissions visually. Toggle read, write, and execute for owner, group, and others. Get numeric, symbolic, and command output. Free, 100% in your browser.
CSS to Tailwind Converter
Convert CSS properties to Tailwind CSS utility classes. Supports layout, spacing, typography, colors, and more. See unmatched properties. Free, 100% in your browser.
JSON Repairer
Fix broken JSON automatically: trailing commas, single quotes, unquoted keys, comments, and more. Repair and validate instantly. Free, 100% in your browser.
Glob Pattern Tester
Test glob patterns against file paths in real time. See which paths match your pattern with instant highlighting. Free, 100% in your browser.
Robots.txt Validator
Validate robots.txt syntax and test URL paths against allow/disallow rules for any user-agent. Debug crawling issues instantly. Free, 100% in your browser.
CSS Flexbox Generator
Build CSS Flexbox layouts visually with live preview. Adjust direction, justify-content, align-items, wrap, and gap. Copy the CSS code. Free online tool.
CSS Grid Generator
Build CSS Grid layouts visually with live preview. Set columns, rows, gaps, and alignment. Copy the CSS code. Free online tool.
CSS Media Query Generator
Build CSS media queries visually. Add conditions for screen size, orientation, color scheme, and more. Use presets for common breakpoints. Copy the CSS code. Free online tool.
CSS Calc Playground
Test and preview CSS calc() expressions in real-time. Experiment with mixed units like px, %, rem, vw. See the computed result live. Copy the CSS code. Free online tool.
SQL Formatter
Format and beautify SQL queries with proper indentation and keyword capitalization. Minify SQL. Free online tool, 100% in your browser.
HTML Formatter
Format and beautify HTML with proper indentation and tag nesting. Minify HTML to reduce file size. Free online tool, 100% in your browser.
CSS Beautifier
Beautify and format CSS with proper indentation and structure. Minify CSS for production. Free online tool, 100% in your browser.
JavaScript Formatter
Format and beautify JavaScript code with proper indentation. Minify JS for production. Free online tool, 100% in your browser.
XML Formatter
Format, beautify, and validate XML with proper indentation and tag nesting. Minify XML for production. Free online tool, 100% in your browser.
YAML Validator
Validate YAML syntax and see parsed output instantly. Detect indentation errors, invalid mappings, and duplicate keys. Free online tool, 100% in your browser.
JSON Diff
Compare two JSON objects and see every difference: added, removed, and changed values with exact paths. Free online tool, 100% in your browser.
SVG Optimizer
Minify and optimize SVG files by removing metadata, comments, editor data, and unnecessary whitespace. See size savings instantly. Free, browser-based.
QR Code Reader
Scan and decode QR codes from uploaded images or your device camera. Instantly extract text, URLs, and data. Free, runs entirely in your browser.
EXIF Data Remover
Strip EXIF metadata from JPEG photos to protect your privacy. Remove GPS location, camera info, and timestamps. Free, runs entirely in your browser.
JSON Flattener
Flatten nested JSON into dot-notation keys and unflatten dot-notation back to nested objects. Configurable separator. Free, runs in your browser.
JSON Key Sorter
Recursively sort JSON object keys alphabetically. Optional reverse order, case-insensitive. Free, runs 100% in your browser.
JSON Duplicate Keys Remover
Detect and remove duplicate keys in JSON objects. Choose to keep first or last occurrence. Reports all duplicates found. Runs in your browser.
JSON Schema Validator
Validate JSON data against a JSON Schema (draft 7+). Detailed error reporting with paths. Free, runs 100% in your browser.
JSONPath Evaluator
Test JSONPath expressions against JSON data. Live evaluation, results highlighted. Supports core JSONPath syntax. Runs in your browser.
CSV Viewer
Paste or upload CSV to view as a sortable, searchable table. Live row count, column types, copy as JSON. Free, runs in your browser.
Docker Compose Converter
Convert docker run commands to docker-compose YAML and back. Supports volumes, ports, env, networks, restart policies. Runs in your browser.
Schema Markup Generator
Generate JSON-LD structured data — Article, FAQ, Product, LocalBusiness, Recipe, Event. Boost rich results in Google. Runs in your browser.
Sitemap Generator
Generate XML sitemaps from a list of URLs. Set lastmod, changefreq, priority. Standard sitemaps.org format. Runs in your browser.
Open Graph Preview
Preview how your URL appears on Facebook, Twitter/X, LinkedIn, Slack. Paste URL or paste meta tags directly. Runs in your browser.
htpasswd Generator
Generate Apache .htpasswd entries with bcrypt, SHA-1, MD5 (apr1), or crypt hashes. Free, runs 100% in your browser.
Cookie Parser
Parse Cookie or Set-Cookie strings into a readable table. Decode URL-encoded values, identify flags (HttpOnly, Secure, SameSite). Runs in browser.
MIME Type Identifier
Look up MIME types from file extensions and vice versa. Searchable database of 600+ types. Runs 100% in your browser.
XPath Tester
Test XPath expressions against XML or HTML. Live evaluation, results highlighted. Supports XPath 1.0. Runs 100% in your browser.
HTML Preview
Edit HTML, CSS, and JavaScript with live preview. Three-pane editor, sandboxed iframe, no signup. Free, runs in your browser.
OTP Manager
Generate time-based one-time passwords (TOTP, RFC 6238) from secrets. Add accounts, scan QR codes, copy 6-digit codes. Runs in your browser.
Luhn Validator
Validate credit card numbers and other identifiers using the Luhn algorithm. Detect card brand, format with spaces. Runs 100% in your browser.
VAT Number Validator
Validate EU VAT number format for all 27 member states. Country-specific length and pattern rules. Runs 100% in your browser.
Bcrypt Generator
Hash passwords with the bcrypt algorithm in your browser. Adjustable cost factor (rounds). Verify a hash matches a password. Runs locally.
Entropy Calculator
Calculate password or string entropy in bits. Charset detection, length analysis, crack time estimate. Runs 100% in your browser.
CSP Header Generator
Build Content-Security-Policy headers visually. Pick directives, allowlist sources, generate header and meta tag. Runs in your browser.
SSL Certificate Decoder
Decode and inspect SSL/TLS X.509 certificates from PEM or DER. View subject, issuer, validity, SAN, fingerprints. Runs in your browser.
Hash Identifier
Identify the algorithm behind a hash string. Detect MD5, SHA-1, SHA-256, bcrypt, Argon2, and more by format. Runs in your browser.
MP3 Tag Viewer
Inspect ID3v1 and ID3v2 metadata in MP3 files: title, artist, album, year, genre, cover art. Runs 100% in your browser.
Regex Builder
Build regular expressions from visual blocks: digits, letters, ranges, groups, quantifiers. Live preview and tester. Runs in your browser.
CSS Minifier
Minify CSS by removing whitespace, comments, and shortening colors. View original vs. minified size and savings. Runs in your browser.
JavaScript Minifier
Minify JavaScript by stripping whitespace and comments. View size savings. Safe-mode that preserves variable names. Runs in your browser.
URL Shortener Preview
Preview where a short URL leads before clicking. Decode bit.ly, t.co, ow.ly and more — without follow redirects in this client-only tool.
TOML Validator
Validate TOML configuration files in your browser. Syntax errors, line numbers, parsed tree view. Runs 100% in your browser.
Nginx Config Generator
Generate nginx server blocks for static sites, reverse proxy, SSL/HTTPS, gzip, caching. Copy or download. Runs in your browser.
Crontab Generator
Build cron expressions from minute/hour/day/month dropdowns. Live preview, plain-English description, next runs. Runs in your browser.
Design & Media
Generate QR codes, barcodes, business cards, color palettes, and CSS effects.
QR Code Generator
Generate QR codes from any text or URL instantly. Customize error correction level and colors. Download as PNG. Free, 100% client-side.
Barcode Generator
Generate barcodes in CODE128, EAN-13, UPC-A, CODE39, and ITF-14 formats. Download as PNG. Free online tool, runs 100% in your browser.
Business Card Generator
Design professional business cards with live preview. Choose themes and layouts, enter your details, and download as PNG. Free, 100% in your browser.
Color Shades Generator
Generate tints and shades for any color. Choose a base color and number of shades, get HEX, RGB, and HSL values instantly. Free, 100% in your browser.
CSS Shadow Generator
Generate CSS box-shadow visually with a live preview. Adjust offsets, blur, spread, color, and opacity. Add multiple layers. Copy the CSS code. Free, 100% in your browser.
CSS Filter Generator
Generate CSS filter effects visually. Adjust blur, brightness, contrast, grayscale, hue-rotate, invert, opacity, saturate, and sepia with live preview. Copy CSS code. Free online tool.
Color Accessibility Checker
Check color contrast ratios against WCAG 2.1 guidelines. Test AA and AAA compliance for normal and large text. Free, 100% in your browser.
Color Mixer
Mix two colors with adjustable ratio. See the result in HEX, RGB, and HSL with a gradient preview and intermediate steps. Free, 100% in your browser.
Complementary Color Generator
Generate complementary, analogous, triadic, split-complementary, and tetradic color schemes from any color. See swatches and copy HEX values. Free, 100% in your browser.
SVG Placeholder Generator
Generate customizable SVG placeholder images with custom dimensions, colors, and text. Copy as SVG, HTML, or data URI. Free, 100% in your browser.
Image Watermark
Add text watermarks to images with custom position, opacity, color, size, and rotation. Supports tiling. Download as PNG or JPEG. Free, 100% in your browser.
Identicon Generator
Generate unique pixel-grid identicons from any text input, like GitHub default avatars. Customize colors and size. Download as PNG. Free, 100% in your browser.
CSS Gradient Generator
Create beautiful CSS gradients visually with live preview. Support for linear, radial, and conic gradients. Add color stops, adjust angles. Copy CSS code. Free online tool.
CSS Border Radius Generator
Generate CSS border-radius visually with live preview. Adjust each corner individually or link them. Supports px, %, and rem units. Copy the CSS code. Free online tool.
CSS Clip Path Generator
Create CSS clip-path shapes visually with live preview. Support for circle, ellipse, inset, and polygon shapes with presets. Copy the CSS code. Free online tool.
CSS Glassmorphism Generator
Create CSS glassmorphism effects visually with live preview. Adjust blur, opacity, color, and border. Copy the CSS code for frosted glass UI. Free online tool.
CSS Animation Generator
Create CSS keyframe animations visually with live preview. Choose from presets like bounce, pulse, shake, spin. Adjust duration, timing, and more. Copy the CSS code. Free online tool.
CSS Text Shadow Generator
Generate CSS text-shadow effects visually with live preview. Adjust offsets, blur, color, and opacity. Add multiple shadow layers. Copy the CSS code. Free online tool.
Color Picker
Pick any color with a visual gradient canvas, hue slider, and alpha control. Get values in HEX, RGB, HSL, and CMYK instantly. Free, runs in your browser.
Favicon Generator
Generate favicons from text, emoji, or uploaded image. Download as ICO and PNG in all standard sizes (16, 32, 48, 180, 512). Free, browser-based tool.
Image Corner Rounder
Round the corners of any image with adjustable radius per corner. Uniform or individual control. Download as PNG with transparency. Free, browser-based.
Signature Draw Board
Draw your signature with mouse, trackpad, or touch. Download as transparent PNG or SVG. Smooth strokes, undo, no signup. Runs in your browser.
SVG Viewer
Paste SVG code and preview it instantly. Inspect dimensions, viewBox, file size, and node count. Download or copy. Runs in your browser.
Image Compare Slider
Compare two images with a draggable before/after slider. Upload, drag the handle, share. Great for retouching, design iterations. Runs in your browser.
Color Palette Generator
Generate color palettes from a base color: monochromatic, analogous, complementary, triadic, tetradic. Export to CSS or JSON.
HTML Color Names
Searchable list of all 147 standard HTML/CSS color names with hex, RGB, HSL values. Click to copy. Runs in your browser.
Text to Image
Render text as a downloadable PNG image. Custom font, color, background, padding, alignment. Runs 100% in your browser.