JSON Diff
JSON Diff — a free json tool in the Tools4U Developer Tools collection.
Workspace
ReadyJSON A
JSON B
Differences
Paste two JSON values above — differences appear here.
JSON contains an error
Fix syntax in both panels.
Free online JSON Diff
JSON Diff — a free json tool in the Tools4U Developer Tools collection. The Tools4U JSON Diff is part of our Developer Tools collection of JSON utilities. It works online in any modern browser — no download, no sign-up and no file upload, so your data never leaves your device.
How to use
Using JSON Diff in three steps
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1
Add your input
Paste text, drop a file, or type directly into the workspace.
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2
Run the tool
Choose the options you need and press the action button.
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3
Copy or download
Take the result with one click — nothing is stored anywhere.
Features
Why people use this tool
Instant results
Everything runs locally, so results appear as you type.
Privacy-first
Your input never leaves the browser. No uploads, no logs.
Handles big inputs
Comfortable with large files and long documents.
Always free
No account, no limits, no watermark on results.
FAQ
Frequently asked questions
Is JSON Diff free to use?
Is my data uploaded to a server when I use JSON Diff?
Can I use JSON Diff on mobile?
Do I need to install any software to use JSON Diff?
Keep going
Related tools
People using JSON Diff often open these next.
JSON Formatter
Format and beautify JSON into clean, readable output in one click.
JSON Validator
Check JSON for errors and see exactly where the problem is.
JSON Minifier
Strip whitespace and comments to make JSON as small as possible.
JSON Beautifier
Format and beautify JSON into clean, readable output in one click.
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