Query String Parser
Parse a query string or a full URL into decoded keys and values. Duplicate keys are kept as separate rows and also grouped in JSON. Rebuild a percent-encoded query string when you are done.
| Key | Decoded value | Raw pair |
|---|
About Query String Parser
Parse a query string online into decoded keys and values, a JSON object, and a rebuilt percent-encoded string. This free query string parser accepts a leading question mark, a raw a=1&b=2 blob, or a full URL from which the search part is taken.
Duplicate keys such as tag=api&tag=http stay as separate table rows and become arrays in JSON, which matches how many servers read repeated parameters. Decoding turns plus signs and percent sequences into readable text so UTF-8 values and spaces are obvious.
Use it to debug search filters, pagination, OAuth redirect URIs, and webhook callback URLs. Rebuild the query after you inspect it if you need a clean encoded form to paste into a client. Pair it with the URL parser when you also need host and path.
Everything is processed locally in your browser. Query values that contain tokens or personal data are not uploaded. Use this free query parameter decoder whenever you need a private look at URL search parameters.
Features
- Decode query parameters into a table and JSON
- Parse, look up, convert, or generate API helpers instantly
- Copy results into docs, tickets, or code
- Private debugging without sending payloads to Free Tool Mate
- No signup and no intentional server-side storage of tool input
How to use Query String Parser
- Paste a URL, headers, status code, cURL command, or JSON into Query String Parser.
- Run the parse, lookup, convert, or generate action.
- Copy the readable result into your docs, ticket, or code.
- Processing stays in your browser for private debugging.
Frequently asked questions
Is Query String Parser free?
Yes. Query String Parser on Free Tool Mate is free to use in your browser. There is no paid unlock for the core tool features described on this page.
Does Query String Parser upload my data?
No. Query String Parser is designed to process your input locally in the browser. Free Tool Mate does not intentionally store tool input or uploaded files on the server.
Do I need an account to use Query String Parser?
No account is required. Open the page, use Query String Parser, and leave when you are done.
What can I use Query String Parser for?
Query String Parser covers Decode query parameters into a table and JSON. It is built for quick, private work in the browser without installing desktop software.