JSON Diff / Compare

text utilitiesPopular

Deep semantic comparison of JSON objects and arrays with side-by-side split view and unified delta tree.

100% Client-Side — Processed privately & locally in your browser.

Comparison Examples & Presets

Sort Keys Alphabetically

8 Total Differences

4 Added0 Removed4 Modified

Original (Left)

{

"data": {

"email": "[email protected]",

"is_verified": true,

"role": "editor",

"settings": {

"notifications": {

"email": true,

"push": false

"theme": "light"

"tags": [

"frontend",

"javascript"

"user_id": 10482,

"username": "alex_dev"

"status": "success"

}

Modified (Right)

{

"data": {

"email": "[email protected]",

"is_verified": true,

"role": "admin",

"settings": {

"language": "en-US",

"notifications": {

"email": true,

"push": true,

"slack": false

"theme": "dark"

"tags": [

"frontend",

"javascript",

"typescript"

"two_factor_enabled": true,

"user_id": 10482,

"username": "alex_dev"

"status": "success"

}

Semantic Comparison Features

Key Order NormalizationEnable "Sort Keys" to prevent unordered keys in dictionaries from generating false positive differences.

Synchronized ScrollingSide-by-side view synchronizes vertical and horizontal scrolling across both viewports with LCS line alignment.

100% Client-SideYour JSON payloads, API schemas, and customer data remain strictly in your browser and are never uploaded.

1Paste or load original JSON in the Left pane and modified JSON in the Right pane.
2Toggle 'Sort Keys Alphabetically' to eliminate false positives caused by key order differences.
3Inspect the aligned Side-by-Side view with synchronized scrolling or switch to the Unified Delta Tree.
4Click 'Format Both' to normalize indentation or 'Swap' to invert the comparison.
5Copy the change summary report to share with your team or include in pull requests.

Frequently Asked Questions

Is my data sent to any server?

No. All processing for this tool occurs directly within your web browser using Web APIs and WebAssembly. Your data never leaves your computer.

Can I use this tool offline?

Once loaded, most utilities remain functional even if your connection drops. DevtUtils is designed to be lightweight and resilient.

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