JSON Compare & Diff Online

Free Deep comparison · Color-coded diff · All nesting levels
Error
Left JSON (Original)
Right JSON (Modified)
Diff Result
// Compare result will appear here

More Developer Tools

JSON Formatter
Format, validate & minify
JSON → YAML
Convert to YAML
JSON → CSV
Array to CSV
JSON → XML
To XML markup
YAML Formatter
Format & validate
Hash Generator
MD5/SHA hashes
JWT Decoder
Decode JWT tokens
Base64
Encode & Decode

Why This Is the Best JSON Compare Tool

Deep Recursive Comparison

Compares JSON at every nesting level. Handles deeply nested objects, arrays, strings, numbers, booleans and null values with full path reporting.

Color-Coded Diff Output

Differences are color-coded: green for additions, red for deletions, yellow for modifications. Instantly spot what changed between two JSON documents.

Full JSON Path Display

Each difference shows the exact JSON path (e.g., server.db.pool.max) so you know precisely where the change occurred in the structure.

100% Client-Side

All comparison happens in your browser. Your JSON data never leaves your device — ideal for comparing sensitive API responses or config files.

Frequently Asked Questions

How does JSON Compare work?

The tool parses both JSON inputs and performs a deep recursive comparison. It identifies added keys, removed keys, and modified values at every nesting level, then displays results with color-coded output.

Can it compare nested JSON objects?

Yes. The comparison is fully recursive and handles deeply nested objects and arrays. Each difference shows the full JSON path (e.g., server.db.pool.max).

Is my data safe?

Absolutely. All processing happens entirely in your browser using JavaScript. No data is ever sent to any server. You can even use it offline once the page is loaded.

Can I compare JSON arrays?

Yes. Arrays are compared element by element (by index). If one array is longer, extra elements are shown as additions or deletions.

In-depth guide
The Complete JSON Guide
Formatting, validation, conversion & best practices
Read the guide