JSON diff workflow
Diff two JSON files without missing structural changes
A text diff highlights every reordered line. A structural diff shows only what actually changed in the data.
Compare configuration and data safely
Use structural comparison for configuration files, exported records, and API payloads.
Load the original file
Paste or select the earlier version of the JSON.
Load the updated file
Paste or select the newer version to compare against it.
Review the change list
Check each added, removed, and modified path.
Export the patch
Save the JSON Patch for documentation or automation.
What the structural report contains
- Added fields present only in the second file
- Removed fields present only in the first file
- Changed values in shared fields
- Type changes such as string to number
Where plain text diffs mislead
- Reordered keys look like changes in a text diff
- Whitespace differences are not meaningful
- Array reordering can hide the real change
- Large files are hard to scan line by line
Get a reliable comparison
- Compare data, not formatted text
- Confirm both files use the same schema version
- Review array changes by identity, not position
- Keep the patch output with the change record
Frequently asked questions
Can I diff two large JSON files?
Yes, within the 25 MB local limit. The diff engine compares paths and values locally.
Does the diff show formatting differences?
No. Whitespace and key order are ignored; only structural and value differences are reported.
What is a "type change" in the report?
When the same field changes from a string to a number or object, the report flags it because code often depends on the type.
Are my files uploaded?
No. The comparison runs entirely in your browser.
Both files stay on the device
The comparison runs in the browser. Redact secrets from configuration files before sharing a diff.
Open JSON Diff