How is this different from text compare?

JSON Compare understands structure—reordered keys or whitespace won't false-positive if ignore-order is enabled.

Are array element moves detected?

Arrays are compared by index; reordering appears as multiple edits.

What if one side is invalid JSON?

Syntax errors are shown for the failing side before the comparison runs.

JSON Compare

Compare two JSON documents and see added, removed, or changed keys and values in a structured view.

Files and content are processed locally in your browser and are not uploaded to our server.

About this tool

Paste two JSON documents to compare their structure and values. The result shows added or removed keys, value changes, and type differences in an expandable view instead of comparing only the raw text.

How to use

Compare JSON by structure and value
Show added, removed, and changed keys
Highlight type changes
Expand or collapse nested results
Report syntax errors separately for each side
Paste left and right JSON: Enter baseline and candidate JSON in both panels.
Run compare: Click Compare to build the structured comparison.
Inspect changes: Expand nodes to see exact paths and value differences.

Examples

Compare two versions of an API response
Review changes between two configuration files
Check whether exported data has changed
Compare expected and actual JSON in a test

Limitations

Large nested documents may take longer to display a very deep structure
Array order is significant unless ignore-order mode applies to objects only
The entered data is processed directly in your browser and is not sent to a server.

FAQ

How is this different from text compare?: JSON Compare understands structure—reordered keys or whitespace won't false-positive if ignore-order is enabled.
Are array element moves detected?: Arrays are compared by index; reordering appears as multiple edits.
What if one side is invalid JSON?: Syntax errors are shown for the failing side before the comparison runs.