JSON to Query String Converter
Convert a JSON object into a URL encoded query string, which is handy when you are building a request URL, a redirect or a tracking link by hand. This tool walks your JSON and produces properly percent encoded key value pairs, using bracket notation for nested objects and repeated bracket keys for arrays so servers that expect that convention parse them correctly. Keys and values are both encoded, spaces become percent twenty, and special characters are made safe. Booleans and numbers are stringified, and nested structures are flattened predictably so the output matches what most web frameworks expect. Paste your JSON object, click convert, and copy the query string to append after a question mark. Everything runs locally in your browser, so the parameters you build are never sent to a server.
How to use JSON to Query String
- Paste a JSON object.
- Click convert to build the query string.
- Copy the URL encoded query string.
Frequently asked questions
How are nested objects flattened?
Nested objects and arrays are expanded using bracket notation in the key names, so structure survives inside the flat query string.
Are values URL encoded?
Yes. Each value is percent-encoded so the resulting query string is safe to append to a URL.
What does the output start with?
It produces the key=value pairs joined by ampersands, which you can prefix with a question mark when appending to a URL.
What is JSON to Query String?
Convert a JSON object into a URL encoded query string, which is handy when you are building a request URL, a redirect or a tracking link by hand. This tool walks your JSON and produces properly percent encoded key value pairs, using bracket notation for nested objects and repeated bracket keys for arrays so servers that expect that convention parse them correctly.
Is JSON to Query String free to use?
Yes. JSON to Query String is completely free, with no sign-up and no usage limits.
Does JSON to Query String work in a web browser?
Yes. JSON to Query String runs in any modern web browser. There is nothing to download or install.
Is my data private with JSON to Query String?
Yes. JSON to Query String runs entirely on your device in your browser, so nothing you enter is uploaded to a server.
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