Developer Tools
Query String Parser
Parse query strings, URLs, and repeated parameters into readable JSON and a copyable key/value table in your browser.
Output will appear here.
What this tool does
This tool extracts URL query parameters, decodes percent-encoded values, groups repeated keys, and prints both JSON and tabular output for debugging links, campaigns, redirects, and API requests.
Common use cases
Parse URL query parameters, inspect repeated keys, and decode campaign or API request data.
This page is optimized around query string parser, URL query parser, query parameter parser, parse query string online, URL parameter parser and the practical workflow described above, not a generic tool list.
How to use it
- Paste a full URL or query string into the input box.
- Review decoded JSON and key/value rows in the output panel.
- Copy the parsed output for docs, debugging, or tickets.
Example workflow
Paste a small sample, run the tool, review the output, then move to the related category or toolkit links below if the job needs another cleanup, conversion, validation, or QA step.
Privacy note
Client-side only: the URL or query string is parsed in your browser and is not uploaded.
FAQ
Can this parse a full URL?
Yes. Paste a full URL or only the query string and the tool extracts the parameters.
Does it handle repeated query keys?
Yes. Repeated keys are grouped as arrays in the JSON output and listed individually in the table output.
Is query data uploaded?
No. Parsing runs locally in your browser.
Explore more tools
Browse the Developer Tools hub or continue with the Developer Data Toolkit when this task is part of a larger workflow.