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Query String Decode
Decode percent-encoded query string parameters back to readable text
Query String (Encoded)
Input
Mode
Query String (Decoded)
Output
What is Query String Decode?
This Query String Decode tool converts percent-encoded URL parameters back to readable text. When analyzing URLs, debugging API requests, or inspecting tracking links, query strings often contain encoded characters like %20 (space), %26 (ampersand), or %3D (equals). This tool decodes these %XX sequences back to their original characters, making it easy to read and understand query parameters, UTM tracking data, search queries, and API parameters.
How to Use
1
Paste encoded query string or URL parameters
2
Click Decode to convert %XX sequences to characters
3
Copy the decoded, readable output
4
Use for debugging, analysis, or documentation
Common Use Cases
Decode UTM tracking parameters for campaign analysis
Debug API query parameters with encoded values
Read search queries from analytics tools
Inspect form submission data in URLs
Decode filter and sort parameters from web apps
Analyze encoded parameters in server logs
Key Features
Decodes all percent-encoded sequences in query strings
Handles %20, %26, %3D, and all other %XX codes
Supports Unicode and emoji in parameters
One-click copy to clipboard
Client-side processing - privacy-friendly
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