Query Parameter Diff & Compare
Paste two query strings to see highlighted line-by-line differences, a change summary, and a similarity percentage. Everything is processed on your device.
Everything runs in your browser. Your data is never sent to our servers.
Example
Example Input
a=1&b=2 vs a=1&b=3&c=4
Example Output
b changed, c added
How to Use
- 1Paste the first query strings (A) in the left box and the second (B) in the right box.
- 2Adjust the options if needed (ignore case, whitespace, or empty lines).
- 3Click Compare (or press Ctrl+Enter).
- 4See the highlighted differences, a summary of how many changes there are, and the similarity percentage. Switch between side-by-side / unified / inline views.
About Query Parameter Diff & Compare
Query Parameter Diff & Compare parses two query strings (or full URLs) into key=value pairs and shows which parameters were added, removed, or had their value changed. Encoded values are decoded for a fair comparison.
Great for comparing tracking parameters, filters, or configuration encoded in a URL.
FAQ
What is the difference between "diff" and "compare"?
Both are done by the same tool. "Diff" highlights the lines/parts that changed (added/removed), while "compare" shows how similar the two inputs are (similarity percentage + summary). You get both at once here.
Is my data sent to a server?
No. The entire comparison is computed in your browser with JavaScript. Nothing is uploaded, logged, or stored on our servers — safe for sensitive data.