JSON Diff Checker Online – Debug & Format json diff
Compare two JSON objects and highlight the differences side-by-side.
JSON A (Original)
JSON B (New)
Difference View
{
"id": 1,
- "name": "Object A",
"status": "active"
+ "name": "Object B",
"status": "inactive",
"version": 2
}
How to Use the JSON Diff Checker
Comparing JSON structures manually is error-prone and time-consuming. Our JSON Diff tool automates this by parsing both inputs, normalizing their formatting, and performing a line-by-line comparison. This is the fastest way to detect added fields, missing keys, or changed values between two sets of data.
To start, paste your "original" JSON into the left panel and the "modified" JSON into the right panel. The results appear instantly in the unified diff view below.
Key Benefits
- Automatic Normalization: We format the JSON before comparing, so differences in whitespace don't trigger false positives.
- Unified View: See additions (+) and deletions (-) in a single, clear stream.
- Privacy First: Your data stays in your browser. No server-side processing is used.
Frequently Asked Questions
A JSON diff tool compares two JSON strings and highlights the lines that have been added, removed, or changed. It is invaluable for comparing API responses or configuration versions.
Green highlights indicate lines that are present in the second JSON but not the first (additions). Red highlights indicate lines that were in the first but are missing from the second (deletions).
Yes, we automatically "pretty-print" both JSON inputs before comparing them to ensure that differences in whitespace don't clutter the actual structural changes.
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