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Query String ⇄ JSON

Convert a URL query string into JSON and back again.

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Input

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Settings

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Run

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Results

Results will appear here once you run the tool.

About Query String ⇄ JSON

Convert a URL query string into JSON and back again. Paste or type your text into Query String ⇄ JSON, adjust the settings, and the result appears below.

Your files stay on your device. ZyncTools has no upload step: the file is read in your browser, processed there, and handed straight back to you. There is no account, no watermark and no size cap beyond what your own device can hold.

Settings. Query String ⇄ JSON gives you control over direction, convert numeric values to numbers, use key[] notation for arrays, url-encode values and indentation.

Also known as: query string, querystring, url, params, json, convert.

How to use Query String ⇄ JSON

  1. Add your input. Paste or type your text into the input box. You can also load a text file from your device.
  2. Choose your settings. Adjust direction, convert numeric values to numbers, use key[] notation for arrays and the other 2 settings to suit what you need.
  3. Run the tool. The result updates as you type. Press Run to refresh it at any point.
  4. Save the result. Copy the output, or press Download to save it. Nothing is kept once you close the tab.

Frequently asked questions

Are my files uploaded when I use Query String ⇄ JSON?

No. Query String ⇄ JSON runs entirely inside your browser. Your text is read locally, processed on your own device, and handed straight back to you. You can confirm this yourself: open your browser's developer tools, watch the Network tab, and run the tool — no request carries your data anywhere.

Is Query String ⇄ JSON free?

Yes, completely. No account, no sign-up, no watermark on your output, and no cap on how many times you can use it. The project is open source under the AGPL licence.

Does Query String ⇄ JSON work offline?

Mostly. The site caches itself after your first visit, so it keeps working without a connection. Tools that need a specialised library — PDF editing, OCR, QR codes, MP3 encoding — need a connection the first time you run them, then that library is cached too.

Related code & data tools

JSON Formatter & Validator Pretty-print, validate and minify JSON with clear error positions. JSON Path Finder List every path in a JSON document, or query it with a dot path. YAML ⇄ JSON Converter Convert YAML to JSON and back, in either direction. XML Formatter Pretty-print, validate or minify XML documents. XML ⇄ JSON Converter Convert XML into JSON and JSON back into XML. CSV ⇄ JSON Converter Convert CSV to JSON records and JSON arrays back to CSV.