Query String to JSON
Convert URL query strings (?a=1&b=2) into JSON objects, with repeated keys as arrays. Free online tool.
✓ 100% free ✓ No sign up ✓ Runs in your browser — nothing uploaded
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Result
How to use Query String to JSON
- 1Paste or type your text in the left box (or open a file).
- 2The converted result appears instantly on the right.
- 3Copy it with one click or download it as a file.
Questions
Is Query String to JSON free?
Yes. Query String to JSON is 100% free with no limits, no watermark, no sign up and no email required.
Is my data sent anywhere?
No. Everything is calculated locally in your browser. Nothing you type is sent to or stored on any server.
Does Query String to JSON work on my phone?
Yes. Query String to JSON works in any modern browser on iPhone, Android, Windows, Mac, Linux and Chromebook. No app or install needed.
Do I need to create an account?
Never. There is no sign up, no login, no email and no paywall. Just open the page and use it.