URL Encoder and Decoder - Percent Encode Online Free

URL Encoder and Decoder

Percent-encode any string for safe use in URLs, query parameters, or HTTP headers. Decode encoded strings back. Component or full URL modes available.

Input0

Output0

Full URL mode (preserves ://, ?, #) Use + for spaces (form-data style)

What is URL encoding?

URL encoding (percent encoding) replaces unsafe characters with %XX hex sequences so they survive transmission through URLs, query strings, and HTTP headers. Spaces become %20, ampersands become %26, and so on.

Component vs full URL

Component mode uses encodeURIComponent: encodes everything that is not letters, numbers, or -_.~. Use this for query parameter values.

Full URL mode uses encodeURI: preserves URL structure characters like ://, ?, #, &. Use this when you have an already-formed URL and want to clean up only stray characters.