Full URLs
Paste a whole URL; everything before ? and after # is ignored.
Query String to JSON Converter
Paste a full URL or a query string and see its parameters as JSON.
Input
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Result
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Modified (right)
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About this tool
How the Query String to JSON works
Convert a URL or query string to JSON. Decodes values, builds arrays from repeated keys and tags[]=, and nests filter[color]=blue style parameters.
How to use the Query String to JSON
- Paste a URL or query string.
- Choose whether to detect numbers and booleans.
- Copy the JSON.
Query String to JSON example
https://shop.example/search?q=running+shoes&page=2&size[]=9&size[]=10&filter[color]=blue{
"q": "running shoes",
"page": 2,
"size": [
9,
10
],
"filter": {
"color": "blue"
}
}When to use it
- Debugging tracking links and UTM parameters.
- Inspecting search and filter URLs from web apps.
- Turning a URL into a test fixture.
Tip: Use JSON to Query String to rebuild the URL after changing a parameter.
Decoding
Percent-encoding and + as space are decoded.
Arrays and objects
Repeated keys and tags[]= build arrays; filter[color]=blue builds nested objects.
Typed values
Numbers and booleans are detected, while values like 007 keep their leading zeros.
FAQ
Common questions
Which bracket styles are supported?
a[]=1, a[0]=1 and a[b][c]=1, the styles used by PHP, Rails, Express (qs) and most frameworks.
What happens with repeated keys?
id=1&id=2 becomes "id": [1, 2].
Can I keep everything as strings?
Yes, untick "Detect numbers & booleans".
Is the URL sent anywhere?
No, it is parsed in your browser.
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