URL Decoder

The URL Decoder converts %XX and + sequences back into readable text — essential for reading analytics URLs, utm parameters and encoded API errors.

How to decode percent-encoded urls and query strings

Choose the mode
Pick “decode percent-encoded URLs and query strings” or the reverse mode from the options — both run in the same box.
Paste your input
The result appears immediately, before you even finish pasting.
Copy the result
One click puts the output on your clipboard.
Use it
analytics links, utm parameters, redirect URLs and logged errors

Typical uses: • Reading what an utm_campaign value actually says • Debugging redirect_uri mismatch errors • Unescaping values copied from server logs

Because the conversion is deterministic and local, results are identical every time and nothing leaks to third parties.

Both directions live on one page, so you never have to bookmark two tools for one job.

Directions	Decode percent-encoded URLs and query strings and re-encode the result for comparison
Processing	100% in your browser — offline after load
Length limit	None
Price	Free, no account needed

Every tool runs locally on your device. Nothing you paste is uploaded, stored, or tracked.

Can it re-encode the result for comparison too?

Yes — switch the mode option and the same box converts in the other direction.

Is there a size limit?

No hard limit. Very long inputs simply take a few more milliseconds.

Does it work offline?

Yes. Once the page has loaded, the conversion runs without any connection.