URL Encoder

Encode and decode URLs

About URL Encoder

URL Encoder encodes and decodes text using JavaScript's encodeURIComponent and decodeURIComponent, entirely in your browser — nothing is uploaded to a server. It's built for encoding a single value (like a query parameter), not a whole URL: running a full URL like https://example.com/path?a=1&b=2 through it will over-encode structural characters such as /, :, ?, &, and =, breaking it as a usable link. A working 'Decode' button is included alongside 'Encode'.

How to use URL Encoder

1Paste the value you want to encode (a query parameter, path segment, etc., not a full URL) into the input box.
2Click 'Encode' to percent-encode special characters and spaces.
3To reverse it, paste percent-encoded text and click 'Decode'.
4Click 'Copy' to copy the result.

Frequently Asked Questions

What is URL encoding?

It converts characters that aren't safe in a URL (spaces, &, =, and others) into a %XX percent-encoded format.

Can I encode a whole URL with this tool?

Not safely — encoding a full URL will also encode its structural characters (like / and :), breaking it. Encode individual values (e.g. a query parameter) instead, then build the full URL around them.

Can I decode with this tool?

Yes — there's a 'Decode' button next to 'Encode' that reverses percent-encoding back to the original text.

Is my data uploaded to a server?

No, encoding and decoding happen entirely in your browser.

Tips & Tricks

✓Encode individual query parameter values, not the full URL string, to avoid breaking the URL's structure.
✓If decoding fails with an error, the input likely contains a malformed percent-encoding sequence.
✓Spaces are encoded as %20, matching standard percent-encoding (not + as some legacy form-encoding tools do).
✓Use this before inserting user-provided text into a query string, so special characters don't break the URL.