JSON · Diff Tool

JSON Diff & Comparison Tool

Compare two JSON documents online. Highlight differences, additions, deletions, and key updates side-by-side with automatic key normalization.

Structural Diff & Comparator

+0 additions-0 deletions

Original JSON0 lines

Modified JSON0 lines

Visual Diff Comparison0 changes

Enter original and modified text above to compute diff.

100% In-Browser Privacy: All conversions, formatting, and validations run purely on your machine using client-side JavaScript. Your data, code snippets, and environment variables are never transmitted to any server or recorded in logs.

Specifications

How JSON Diff Works

Formats and optionally sorts keys in both left and right JSON inputs.
Computes line-by-line differences using an optimized diffing algorithm.
Visually distinguishes additions (+ green), deletions (- red), and modified values.

Demonstration

Example Input & Output

Computes semantic and line differences between two JSON payloads, highlighting added properties, removed keys, and modified values.

Original JSON (Left)

{
  "name": "Sandeep",
  "version": "1.0.0",
  "active": true,
  "skills": ["Astro", "TypeScript"]
}

Modified JSON (Right)

  {
-   "version": "1.0.0",
+   "version": "1.1.0",
+   "location": "India",
    "skills": [
      "Astro",
      "TypeScript",
+     "Tailwind"
    ]
  }

Applications

Common Use Cases

API Regression Testing

Compare response payloads between staging and production environments to catch unintended schema drifts.

Config Drift Detection

Inspect configuration changes between different release commits.

Guidelines

Key Specifications & Gotchas

Unsorted Key Differences

Differences in property order can cause false diff positives unless keys are normalized first.

Questions

Frequently Asked Questions

Does key ordering affect the JSON diff?

Our diff tool normalizes keys so differences in property order do not show as false positives.

Can I compare large JSON files?

Yes, the diff tool operates in-browser with fast performance on large JSON datasets.

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