Decode a Query String Online
Decode a full query string and read every parameter. Turns %XX sequences back into readable values.
Part of the free URL Decoder. Runs in your browser — nothing is uploaded.
Decode a Query String Online
A query string is easier to debug after decoding. Split on &, then decode each value so you can see the real filters, tokens and redirect targets.
Worked example: An encoded query
Encoded
q=css%20grid&city=S%C3%A3o%20Paulo
Decoded
q=css grid city=São Paulo
Practical tip
Use the live decoder’s URL breakdown table: it splits protocol, host, path and every query key for you.
How to use this URL Decoder
- 1Use the live tool above — it runs entirely in your browser and never uploads your data.
- 2Paste the sample from the worked example, or use your own input.
- 3Copy the result, then adapt the same steps in your editor, script, or pipeline.
Decode a Query String Online FAQs
Should I decode the whole URL at once?
You can, but decoding a full URL will also decode encoded slashes in values. Decoding each parameter is safer.
Why is a parameter missing?
An unencoded & inside a value splits the query. The original sender should have encoded that value.
More URL Decoder pages
- URL Decode %20 to SpacesDecode %20 and other percent-encoded bytes back to readable text. Paste an encoded URL or query value.
- decodeURIComponent OnlineRun decodeURIComponent on any string. Catch malformed % sequences and see the exact JavaScript result.
- Decode + as a SpaceTreat + as a space before percent-decoding, the same way HTML form bodies are decoded.
- Decode UTF-8 Percent-EncodingDecode percent-encoded UTF-8 back to accents, CJK characters and emoji. See caf%C3%A9 become café.
- Parse URL Query ParametersSplit a URL into protocol, host, path and a table of query parameters. Decode each value automatically.
- Fix Malformed Percent-EncodingSee why decodeURIComponent throws on a trailing % or a lone %2, and how to clean the string before decoding.
- Bulk URL DecoderDecode many percent-encoded lines at once. Paste a list of values or URLs and decode each line.
- Decode a Nested Redirect URLDecode a return_to / redirect parameter that is itself a URL. See the real destination hidden behind percent-encoding.
- Decode + and % Sequences TogetherDecode strings that mix + (form space) and %HH sequences. The usual case for query strings from HTML forms.