Query String → JSON

Paste a full URL or query string and convert query parameters into structured JSON. Runs entirely in your browser.

Mode:

DecodeKeep duplicates as:Keys:Sort keysPretty JSONType inferenceTreat + as space

Normalize:

Awaiting input

JSON Output

FilterRegex

Awaiting input

Parsed JSON will appear here.

How to use

Paste a full URL or query string and choose options (decode, arrays for duplicate keys, sort keys).
Click Parse to view JSON; copy or download the result.
Use the sample to see how duplicates become arrays when enabled.

FAQ & privacy

Does this run locally? Yes. Parsing happens in your browser.

Full URL or query string? Both work; the tool extracts the part after `?` automatically.

Duplicate keys? Keep the first value or group into arrays using the toggle.