decodeURIComponent() — run online

URL

decodeURIComponent()

Decodes a percent-encoded URI component

→ stringPHP: urldecode()ES3+

encodedURIstring

Percent-encoded string to decode

decodeURIComponent(encodedURI)

RESULT

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Parameter Reference

Parameter	Type	Status	Description
encodedURI	string	required	Percent-encoded string to decode

About

decodeURIComponent() converts percent sequences (%XX) back into their original characters. Used when parsing URL query parameters, processing history API data, or decoding data from GET requests. Invalid percent sequences throw URIError — always use try/catch on untrusted input.

Browser Support

Introduced in ES3 (1999) alongside encodeURIComponent. Supported by all browsers without exception.

Tips & Gotchas

Invalid sequences throw URIError — use try/catch
for query string parsing, URLSearchParams is more convenient
do not decode full URLs — use decodeURI() for that.