URL Encoder / Decoder

A URL encoder/decoder that percent-encodes text for use in URLs or decodes %20-style URLs back to readable text, with two modes — value-safe component encoding and structure-preserving full-URI encoding.

This tool encodes text safely for use in URLs, and decodes encoded URLs back into something a human can read. URLs can only carry a limited set of characters. Spaces, ampersands, question marks, non-English characters — anything outside that set must be percent-encoded (a space becomes %20, an ampersand %26) or the URL breaks in transit: query parameters get split in the wrong places, links in emails stop working, APIs reject requests.

The component/full-URI distinction is the part everyone gets wrong once. Component mode encodes every reserved character including &, = and / — exactly what you want when inserting a value into a query string, so that "Tom & Jerry" becomes Tom%20%26%20Jerry instead of accidentally terminating the parameter at the &. Full-URI mode leaves the structural characters (:, /, ?, &) intact — what you want when encoding a complete URL that must keep its shape while fixing spaces and unicode. Encoding a whole URL in component mode mangles it; encoding a query value in URI mode leaves dangerous characters unescaped.

Decoding is just as useful in daily work: unwrapping tracking-laden links from marketing emails to see the real destination, reading the parameters buried in an OAuth redirect, or turning a logged request URL back into legible text. Everything runs locally in your browser, and malformed input (a stray % not followed by two hex digits) produces a clear error instead of silent corruption.