Code & Data · Local-first
JSON Diff Online
Compare two JSON documents line by line.
Open JSON DiffFree · No sign-up · Browser-based processing
What JSON Diff does
Compare two JSON documents after consistent formatting to spot added, removed and changed lines.
Common uses
- Review API response changes
- Compare configuration revisions
- Check test fixtures during debugging
How to use JSON Diff
- Paste the original JSON into the first editor.
- Paste the modified JSON into the comparison editor.
- Run the diff and review additions and removals in the output.
Privacy: Runs locally in your browser. Input is not uploaded to the DevNet Kit server.
JSON Diff example
Try the tool with this representative input:
{"port":8080,"debug":false}JSON Diff FAQ
Is this a semantic object diff?
It is a formatted line comparison, so property order can affect the output.
Are both documents validated?
Yes. Invalid JSON must be corrected before a reliable formatted comparison can be produced.
Is comparison data uploaded?
No. Both documents stay in the browser.