JSON Compare
Compare two JSON objects side by side. Highlights added, removed, and changed properties with dot-notation paths. Semantic comparison - property order does not matter.
Compare two JSON objects. Differences are highlighted by type.
What is this tool?
The JSON Compare & Diff tool performs a deep, semantic comparison of two JSON objects. Unlike a simple line-by-line text diff, it understands the structure of JSON - so reordering properties in an object does not show as a difference. It reports three types of changes: keys added in the right object, keys removed from the left, and values that changed.
How to use it
- Paste or upload the original JSON into the Left panel.
- Paste or upload the modified JSON into the Right panel.
- Click Compare JSON.
- Review the differences - use the filter buttons to show only added, removed, or changed entries.
Colour coding
- Green (Added) - The key/value exists in the right JSON but is missing from the left.
- Red (Removed) - The key/value exists in the left JSON but is missing from the right.
- Amber (Changed) - The key exists in both JSONs but the value differs.
How paths are displayed
Differences are reported using dot-notation paths. For example, user.email means the email property inside the user object. Array elements use bracket notation: roles[0] refers to the first item in the roles array.
Privacy & Security
All comparison happens entirely in your browser using client-side JavaScript. Your JSON data is never sent to any server or third party.
Our Tool Features
Why developers and engineers prefer this tool for everyday development workflows.
Cross-Device Compatibility
Works seamlessly on all modern desktop, tablet, and mobile browsers including Chrome, Firefox, Safari, Edge on Windows, macOS, Linux, Android, and iOS.
Fast In-Browser Execution
Processes your data in real-time directly inside your browser. No queue wait times, no network round-trips, and zero latency.
100% Client-Side Privacy
Your code, tokens, passwords, and files are never transmitted to any external server or saved in logs. Everything runs locally in memory.
Instant File & Clipboard Input
Supports one-click sample loading, file drag-and-drop, and pasting directly from your clipboard (Ctrl + V) for effortless workflows.
Strict Standards Compliant
Built strictly according to official specifications (RFCs, W3C, ISO, and standard cryptographic algorithms) ensuring accurate output every time.
Unlimited Free Usage
No registration, no accounts, no subscriptions, and no hidden daily quotas. Use this tool as many times as you need without restrictions.
Recent Updates & Improvements
Continuously maintained and improved based on developer feedback.
Optimized processing algorithms with Web Workers and native browser APIs (SubtleCrypto, Canvas 2D) for instantaneous zero-latency execution.
Added instant clipboard pasting (Ctrl + V) and drag-and-drop file support to accelerate developer productivity without manual downloads.
Redesigned responsive touch controls, flexible copy buttons, and camera preview framing for mobile and tablet browsers.
Frequently Asked Questions
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