JSON Diff Tool

Compare and diff JSON objects

JSON 1

Loading editor...

JSON 2

Loading editor...

JSON Diff Tool

Compare and diff JSON objects instantly with our powerful, browser-based diff tool. Designed with developers and data engineers in mind, this tool delivers lightning-fast comparison, visual difference highlighting, and 100% client-side processing to keep your data secure. Whether you're comparing API responses, configuration files, or data structures, the diff tool handles everything smoothly without slowing down your machine.
Built on the same high-performance core as our industry-leading JSON formatter, the JSON Diff Tool ensures precise comparison, real-time difference detection, and comprehensive change visualization. It's perfect for debugging API changes, tracking configuration modifications, reviewing data updates, or identifying discrepancies between JSON documents.
With support for side-by-side comparison, copy/paste input, file uploads, and detailed change highlighting, this JSON Diff Tool becomes an essential part of any developer's workflow. No installations, no backend requests, no data tracking—just fast, secure, and reliable JSON comparison right from your browser.
Optimize your productivity with a clean UI, blazing performance, and robust diff capabilities—built to handle even the most complex JSON structures with ease.

Key capabilities

  • Visual diff: Side-by-side comparison with color-coded additions, deletions, and modifications for easy identification.
  • Deep comparison: Compare nested objects and arrays with detailed path information for each difference.
  • Change summary: Get a comprehensive list of all changes including added, removed, and modified properties.
  • File support: Upload JSON files directly, or paste JSON from your clipboard for quick comparison.

Privacy & reliability

Just like our other formatters, the JSON Diff Tool experience is completely local—no uploads, no external APIs, no telemetry. Your JSON data never leaves your machine, making it safe for sensitive configurations, private API responses, or confidential data.

Accurate comparison provides clear, actionable insights so you can quickly identify and understand changes between JSON documents.

Quick how-to

  1. Enter or paste your first JSON in the left editor.
  2. Enter or paste your second JSON in the right editor.
  3. Click Compare to see the differences highlighted.
  4. Review the diff results and change summary below.