URL encoder / decoder

Percent-encode or decode URLs and query parameters. Choose between component, full URI, or form (x-www-form-urlencoded) variants.

Features

Switches between encodeURIComponent, encodeURI and x-www-form-urlencoded for the right escaping.
Component mode safely escapes a single query parameter without touching reserved characters.
Form mode turns spaces into '+' so the output matches HTML form submissions exactly.

How it works

Set the mode to Encode or Decode.
Choose Component, Full URI or Form depending on what you're escaping.
Paste a URL or query value and copy the percent-encoded result as you type.

Your files never leave this page

Every conversion runs entirely in your browser using WebAssembly. There is no upload, no server-side processing, no analytics, and no cookies. Open DevTools → Network during the operation and you will see zero outbound traffic.

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Topics covered

url encode online
url decode online no upload
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percent encoding online
x-www-form-urlencoded encoder
free url encoder decoder