JSON ⇄ Query String
JSON ⇄ Query String is a free online converter that transforms JSON objects into URL query strings and back, handling URL encoding and decoding automatically. Work in two side-by-side panels, convert with one click, and copy the result instantly.
The conversion runs locally in your browser — no parameter data is uploaded. Free with no registration, it helps frontend and backend developers build request parameters, parse query strings out of URLs, and inspect GET request parameters while debugging.
How to Use
- Enter a JSON object on the left or paste a query string on the right
- Click "JSON to Query" or "Query to JSON" to convert
- URL encoding or decoding is applied automatically
- Copy the result with the copy button
FAQ
Is the JSON ⇄ Query String converter free?
Yes, it's completely free with no usage limits and no account required.
Is my parameter data uploaded anywhere?
No. The conversion happens entirely in your browser — neither URL parameters nor JSON data is sent to a server.
Does it handle URL encoding automatically?
Yes. Special and non-ASCII characters are percent-encoded when building the query string and decoded when parsing it back, so you never deal with encoding by hand.
Can I parse the query string from a full URL?
Paste the part after the question mark and each key-value pair is unpacked into a field of a JSON object, making it easy to inspect every parameter's value.