What is percent-encoding?
URLs can only contain a limited set of characters safely. Percent-encoding (like %20 for a space) lets any character appear in a URL. This tool converts both directions instantly.
URL Encoder / Decoder
Switch between encode and decode to percent-encode text or decode a URL-encoded string.
How it works
- 1
Paste the value to encode or decode.
- 2
Pick the direction / algorithm if the tool has modes.
- 3
Copy the output. Decoding is not the same as verifying a signature.
Why use this tool
- Runs entirely in your browser — nothing is uploaded to a server.
- 100% free, no sign-up, no limits.
- Works in any modern browser — no app install, no extension, no account.
How to use URL Encoder / Decoder
Use URL Encoder / Decoder to transform encodings in your browser. If you decode a JWT or similar token, that does not prove the signature is valid.
Tips for better results
Watch for padding and character-set issues. Never paste production secrets into a shared screen.
Privacy and offline-friendly processing
Whenever possible, URL Encoder / Decoder processes your data locally with JavaScript in this page. That means drafts, secrets, and unfinished work stay on your device by default. Prefer this workflow when you do not want to upload sensitive text, tokens, passwords, or files to a third-party service.
Frequently asked questions
What is the difference between encodeURI and encodeURIComponent?
This tool encodes individual values (like encodeURIComponent), escaping characters such as & and = that have special meaning in query strings.
Can I decode a full URL with a query string?
Yes, paste the full string and it will decode all percent-encoded sequences.
Is my data uploaded when I use this tool?
For most FlyUtils tools, no. Processing happens in your browser with JavaScript. If a tool ever needs a server, that will be stated clearly on the page.
Is URL Encoder / Decoder free to use?
Yes. URL Encoder / Decoder is free, with no sign-up and no artificial usage caps for normal personal and work use.
Does URL Encoder / Decoder work on mobile?
Yes. The page is mobile-first, so you can paste input, tweak options, and copy results from a phone or tablet.