Diff Checker

Free online diff checker. Compare two text snippets. Fast, secure, and 100% client-side. No registration required.

Runs in your browser. No account required.

How to use Diff Checker

Compare two blocks of text, code, CSV or JSON and see added, removed and changed lines side by side.

1. Paste the original text on the left and the changed text on the right.
2. Choose whether to ignore whitespace, letter case or empty lines.
3. Review the highlighted differences and the change counts.

Questions

Can I compare JSON or CSV output?

Yes. Format JSON first with the JSON Formatter so both sides use the same indentation, then compare them line by line.

Can it ignore formatting changes?

Yes. Ignore whitespace, case-insensitive comparison and ignore empty lines can each be turned on.

Is my data uploaded to a server?

No. The conversion runs in your browser with JavaScript, so your files and text stay on your device.

Related tools

• CSV to JSON: Convert CSV files to JSON.
• JSON to CSV: Convert JSON to CSV.
• JSON Formatter: Prettify or minify JSON.
• Byte Converter: Bytes, KB, MB, GB, TB, PB.