Question 1

URL Encoding

Accepted Answer

URL encoding (percent-encoding) converts characters that are not allowed in a URL into a %XX representation, where XX is the hexadecimal value of the byte. encodeURIComponent() encodes all characters except the unreserved set: A–Z a–z 0–9 - _ . ~. Common conversions: space → %20, & → %26, = → %3D, + → %2B.

Question 2

Common uses

Accepted Answer

Query parameters: encode each key and value separately before building a URL — e.g. q=hello world becomes q=hello%20world. Form data: browsers encode form fields as application/x-www-form-urlencoded, replacing spaces with + and special chars with percent-sequences.

Question 3

encodeURI vs encodeURIComponent

Accepted Answer

encodeURIComponent() encodes everything except A–Z a–z 0–9 - _ . ~ — use it for individual query parameter values. encodeURI() preserves characters that are valid in a full URL (: / ? # [ ] @) — use it when encoding an entire URL without breaking its structure. This tool uses encodeURIComponent(), the safer default for most use cases.

Question 4

How to URL-encode a string

Accepted Answer

Select Encode or Decode mode. Paste your text or URL into the input field and the encoded (or decoded) result appears instantly. Click Copy to copy the result. Use this when building query strings, passing special characters in API parameters, or debugging percent-encoded URLs.

URL Encoder

URL Encoding

Common uses

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