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JSON Diff Checker

Compare two JSON payloads and see added, removed, and changed keys highlighted. Deep-diff works across nested objects.

Updated April 2026
Added
2
Removed
0
Changed
2
~ version: "1.0.0" → "1.1.0"
+ tools[3]: "csv"
~ author.role: "founder" → "founder+engineer"
+ published: true

What it does

Compare two JSON payloads and see every added, removed, and changed key highlighted — including deep nested changes inside arrays and objects. Perfect for diffing two API responses, a schema change, or a config file across environments.

For line-level text diffs try diff checker. Format either side first with JSON formatter, and for YAML try YAML formatter before converting.

How to use it

  1. Paste JSON A in the left box and JSON B on the right.
  2. Click Compare — changes are highlighted per key.
  3. Use the summary at the top to see total added / removed / changed.
  4. Copy the diff report or individual changes.