handyman
Hazuu Tools

JSON Compare

Compare two JSON objects and see the differences highlighted.

Left JSON
Right JSON
info

About JSON Compare

JSON Compare is a free online tool that lets you compare two JSON objects side by side and instantly see the differences between them. Whether you are debugging API responses, reviewing configuration changes, or validating data migrations, this tool highlights added, removed, and modified properties with clear color coding so you can spot changes at a glance.

The comparison engine performs a deep recursive diff across nested objects and arrays, handling any level of complexity. All processing happens entirely in your browser — no data is ever sent to a server — so your JSON remains private and secure. Simply paste or upload your JSON documents, click Compare, and get a structured diff tree with a summary of all changes.

help

How to Use

01

Paste or Upload JSON

Enter your two JSON documents into the left and right editor panes. You can paste text directly or use the upload button to load JSON files from your computer.

02

Click Compare

Press the "Compare" button to run a deep comparison. The tool will parse both inputs and recursively diff every property, including nested objects and arrays.

03

Review Differences

Browse the color-coded diff tree below the editors. Green indicates added properties, red shows removed ones, and amber highlights modified values. Use the summary badges for a quick overview of total changes.

quiz

Frequently Asked Questions

What is JSON Compare? expand_more
JSON Compare is a tool that takes two JSON objects and performs a deep, recursive comparison to identify every difference between them. It categorizes changes as added (present only in the right JSON), removed (present only in the left JSON), or modified (value changed), then displays the results in an interactive diff tree.
Is my data secure when using this tool? expand_more
Yes. JSON Compare processes everything locally in your browser using JavaScript. No data is transmitted to any server, so your JSON content remains completely private and secure on your device.
Can it compare deeply nested JSON? expand_more
Absolutely. The comparison engine recursively traverses all levels of nested objects and arrays. It compares array elements by index and object properties by key, no matter how deep the structure goes.
What happens if I paste invalid JSON? expand_more
The tool validates both inputs before comparing. If either side contains invalid JSON, an error message will appear specifying which side has the syntax error and what the issue is, so you can fix it before re-comparing.