Need to Compare Two JSON Documents?
You have two API responses, two config files, or two versions of the same dataset. You need to know what changed — field by field — without reading both files line by line. You could use diff, but JSON is not line-oriented. The same logical change can look like a complete rewrite.
OnliTools JSON Compare
OnliTools JSON Compare compares two JSON documents with field-level highlighting and a concise summary. Paste both JSONs, and it shows you exactly what was added, removed, or changed. All processing happens in your browser.
How to Use It
- Go to onlitools.com/json-compare.
- Paste your two JSON documents into the left and right panels.
- Review the field-level diff and summary.
- Copy the results or export the diff.
Great For
- Developers — compare API responses before and after a deployment
- DevOps — audit configuration drift between environments
- Data engineers — verify dataset changes without writing custom scripts
Wrap Up
No script, no install, no upload to a server. OnliTools JSON Compare shows you exactly what changed between two JSON documents in seconds.
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