Query String to JSON Converter
Parse a URL query string into a clean JSON object so you can inspect, log or reuse the parameters from a link. This tool accepts a full URL or a bare query string with or without the leading question mark, splits it into key value pairs, and URL decodes both sides so percent encoded characters and plus signs turn back into real text. When a key appears more than once, or ends in the array brackets convention, its values are grouped into a JSON array so nothing is lost. Empty values become empty strings rather than being dropped. Paste your query string or URL, click parse, and copy the pretty printed JSON. Everything runs locally in your browser, which means the URLs and parameters you paste are never sent anywhere or recorded.
How to use Query String to JSON
- Paste a URL query string.
- Click convert to parse it into JSON.
- Copy the JSON object.
Frequently asked questions
What does it produce from a query string?
It parses the key=value pairs into a clean JSON object, decoding each value along the way.
How are repeated keys handled?
When a key appears multiple times, its values are grouped into an array so none of them are lost.
Do I need to strip the leading question mark?
No. It accepts a query string with or without the leading question mark and parses the parameters either way.
What is Query String to JSON?
Parse a URL query string into a clean JSON object so you can inspect, log or reuse the parameters from a link. This tool accepts a full URL or a bare query string with or without the leading question mark, splits it into key value pairs, and URL decodes both sides so percent encoded characters and plus signs turn back into real text.
Is Query String to JSON free to use?
Yes. Query String to JSON is completely free, with no sign-up and no usage limits.
Does Query String to JSON work in a web browser?
Yes. Query String to JSON runs in any modern web browser. There is nothing to download or install.
Is my data private with Query String to JSON?
Yes. Query String to JSON runs entirely on your device in your browser, so nothing you enter is uploaded to a server.
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