Query String Parser — URL Parameters to JSON
Parse URL query strings into JSON and back. Decode, inspect, and build URL parameters with ease.
- Handles full URLs, bare query strings, and hash-prefixed strings
- Repeated keys are collected into an array in JSON output
- Values are automatically URL-decoded (e.g.
hello+world→hello world)
Frequently Asked Questions about Query String Parser
- Is Query String Parser completely free to use?
- Yes, Query String Parser is 100% free with no sign-up, no watermarks, and no usage limits.
- Is my data private?
- Query String Parser runs entirely in your browser — no data is ever sent to our servers. Your content stays on your device.
- Does it work offline?
- Once the page has loaded, Query String Parser works fully offline in your browser — no internet connection is required.
- Is there a file size or length limit?
- For text-based conversions there is no practical limit. The tool handles data up to several hundred kilobytes without issues.
- Does Query String Parser work on mobile and tablet?
- Yes, Query String Parser is fully responsive and works in all modern browsers on desktop, tablet, and mobile.
This tool runs entirely in your browser. No data is ever sent to our servers.