JSON to Query String Converter
Turn a flat JSON object into a URL query string.
Query string
Building query strings from JSON
A query string passes key/value data in a URL after the ?. This tool flattens a JSON object into one, URL-encoding every key and value so spaces and symbols are safe. Array values are repeated as multiple parameters (e.g. tags=new&tags=sale), and booleans/numbers are stringified. It's handy for assembling UTM links and API requests. Everything is encoded locally in your browser.
Private & free — this tool runs entirely in your browser.
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