Cookie Diff & Compare
Paste two cookie sets 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
session=a; theme=dark vs session=b; theme=dark
Example Output
session changed
How to Use
- 1Paste the first cookie sets (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 Cookie Diff & Compare
Cookie Diff & Compare parses two cookie strings (separated by semicolons or newlines) into name=value pairs and compares them. You see which cookies were added, removed, or had their value changed.
Useful for debugging session issues or comparing cookies across environments.
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.