Query String Parser
Convert query strings and JSON objects both ways
π 100% client-side β your data never leaves this pageInput
Output
Converted output will appear here
π 100% client-side
About this tool
Convert URL query parameters to JSON and back in real time. This tool auto-detects input direction and presents parsed key-value rows for easier debugging. It is useful for API testing, UTM analysis, frontend router state handling, and clean parameter generation for links.
Frequently Asked Questions
Can it parse repeated query keys?
Yes. Repeated keys are grouped into arrays in JSON output.
Does it support leading question mark?
Yes. Inputs like ?a=1&b=2 are handled correctly.
Can I convert JSON back to query params?
Yes. The converter supports JSON object to URL query string conversion.