JSON Compare
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Compare two JSON documents and instantly see added, removed, and changed values. JSON mode highlights changed keys with path hints.
- On your device
- No signup
Private on your device
Your information stays on your device and is not uploaded.
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Paste original and changed text to see added, removed, and unchanged lines in a side-by-side diff. Diffing runs locally with no uploads.
How to use this tool
1. Paste the original text in the left panel. 2. Paste the revised text in the right panel. 3. Scan added, removed, and unchanged lines. 4. Use the counts to spot accidental deletions before commit.
Worked example
Example: changing return a+b to return a + b shows a single modified line with surrounding context unchanged.
How it works
Paste original and changed text to compare line-by-line differences side by side. Diffing runs locally in your browser with added, removed, and unchanged line counts.
Limitations
Results are based on the inputs you provide and may not cover every edge case. This tool is for general use and is not professional advice.
Privacy and file handling
Your data stays on your device and is not uploaded.
FAQ
Frequently asked questions
Is Code Diff free?
Yes. It is free to use and you do not need to sign in or create an account.
Is my data private?
See the privacy note on this page. Many tools run on your device; some heavier file tools may use secure temporary processing when required.
Can I use Code Diff on mobile?
Yes. Open this page on your phone or tablet, enter your inputs, and use the on-screen controls.
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- JSON Compare — Compare two JSON documents and instantly see added, removed, and changed values. JSON mode highlights changed keys with path hints.
- Text Difference Checker — Compare two pieces of text and highlight changes.
- XML Compare — Compare two XML documents and see tag, attribute, and text line changes.
- JSON Formatter — Format, minify, and validate JSON with optional key sorting.
- HTML Formatter and Minifier — Format or minify HTML markup on your device.
- XML Formatter — Format, minify, and validate XML with readable indentation.
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