Free Query String Parser Online
Parse URL query strings instantly with our free online tool. Extract and decode URL parameters to JSON format. No signup required.
URL or Query String Input
Parsed Parameters (JSON)
How to Use
Paste URL
Enter a full URL or just the query string
Parse
Click parse to extract parameters
Review Output
View decoded parameters as JSON
Copy
Copy the JSON output to clipboard
Automatic Decoding
URL-encoded parameters are automatically decoded to readable text
Array Support
Handles array parameters (key[]) and duplicate keys automatically
Privacy First
All parsing happens in your browser. No data is sent to servers
Frequently Asked Questions
What formats are supported?
You can paste a full URL (https://example.com?key=value) or just the query string (key=value&foo=bar).
How are duplicate keys handled?
Duplicate keys are automatically converted to arrays. For example, tag=a&tag=b becomes {tag: ["a", "b"]}.
Is my data secure?
Yes! All parsing happens locally in your browser. Your URLs never leave your device.
Are special characters decoded?
Yes, URL-encoded characters (like %20 for space) are automatically decoded to their original form.