URL Encode/Decode
Percent-encode or decode strings with full Unicode support.
Browser onlyYour data never leaves this device.
Runs entirely in your browser. Your data never leaves this device and is never stored.
Details: Privacy policy
Input
RFC 3986 compliant. Unicode safe. Nothing is stored.
Result
No input yet.
Enter text above to convert it.
URL Encoder percent-encodes a string following RFC 3986, or decodes one that has already been encoded, with full Unicode support in both directions. Only ASCII alphanumerics and the four unreserved marks are left untouched; every other code point is encoded from its UTF-8 bytes, which is why an Arabic sentence produces a much longer encoded string than an English one of the same length. Spaces become plus signs when encoding, and both plus signs and percent-twenty decode back to a space, matching how form bodies are read. Decoding is strict: a valid percent sequence is decoded and anything else is rejected rather than guessed at, because a lenient decoder turns a corrupted string into a plausible-looking wrong one. It is the tool for encoding a query value before it goes into a URL, for reading a percent-encoded parameter copied out of a log, and for preparing a form body by hand. Everything runs in your browser and nothing is uploaded. Only ASCII alphanumerics and dash, dot, underscore and tilde survive unencoded; everything else is UTF-8 encoded first and then percent-encoded, and decoding accepts only valid %XX sequences.
How to use URL Encode/Decode
- Paste text or a percent-encoded string.
- Choose Encode or Decode.
- Copy or download the result.
What you get
- A percent-encoded string following RFC 3986, or the decoded form when you go the other way.
- Only ASCII alphanumerics and the four unreserved marks left untouched; everything else encoded from its UTF-8 bytes.
- A strict decode that accepts valid %XX sequences and rejects anything else rather than guessing.
When to use URL Encode/Decode
- Encode query string values for safe inclusion in URLs.
- Decode percent-encoded strings from logs or URLs.
- Prepare data for application/x-www-form-urlencoded bodies.
- Decode a tracking URL copied out of a log to read the parameter values a server actually received.
Frequently asked questions about URL Encode/Decode
Does this tool send my data anywhere?
No. All encoding and decoding runs locally in your browser. Nothing is sent to any server.
Why does encode produce '+' for spaces?
This follows the application/x-www-form-urlencoded convention. Decoding treats both '+' and '%20' as spaces.
Can it handle emoji and non-Latin scripts?
Yes. Text is encoded as UTF-8 bytes, then each byte is percent-encoded. All Unicode code points round-trip correctly.
Why does decode reject my input?
Decode mode only accepts valid percent-encoded strings: alphanumerics, '-', '.', '_', '~', and valid '%XX' sequences. Stray '%' or invalid hex digits are rejected.
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Embed this in-browser tool into any blog, documentation, or dashboard. Includes an optional dofollow backlink badge to credit Tools Hub.
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