What diff algorithm is used?

DevDash uses a line-by-line comparison that highlights added, removed, and unchanged lines, similar to git diff output.

Can I compare JSON objects?

Yes. For the best results, format both JSON objects first using the JSON Formatter, then paste them into the diff checker.

Is there a size limit?

Since everything runs in your browser, very large texts (over 100KB) may be slow to diff. For most use cases, performance is instant.

Diff Checker

Text / Data Tools

Paste two text blocks side by side to see a visual diff with additions (green), deletions (red), and unchanged lines. Useful for comparing config files, API responses, or code snippets.

100% client-side processing

Original Text

Modified Text

How to Use Diff Checker Online

Paste your data into the input field above
The result appears instantly in the output area
Click "Copy" to copy the result to your clipboard

Compare two texts and highlight differences. Runs 100% client-side — no data is sent to any server.

Frequently Asked Questions

Related Tools

JSON Formatter

Pretty-print and validate JSON data