Diff Checker

Compare Differences With a Visual Diff Checker

Our Diff Checker is the fastest way to compare two snippets of code or text with pixel-perfect accuracy. Paste your original text on the left, your modified text on the right, and instantly spot changes with green highlights for additions and red highlights for deletions. It works in the browser, so sensitive snippets never leave your device.

Who Needs an Online Diff Tool?

• Developers: Compare source files before committing, inspect pull requests, and resolve merge conflicts.
• Tech writers & editors: Track revisions across documentation, blog posts, or product copy without version control.
• Security & QA teams: Audit configuration drifts, deployment manifests, or API responses line by line.
• Legal & compliance teams: Review contract changes or policy updates with a clear audit trail.

Key Features That Save Time

1. Side-by-side or unified view for whichever layout matches your workflow.
2. Optional whitespace and case ignoring to focus only on meaningful changes.
3. Diff statistics showing insertions and deletions for quick overviews.
4. Copy or download the diff as a patch file for sharing in tickets or chats.
5. Color-coded syntax-friendly output ideal for code reviews and documentation.

Best Practices for Accurate Text Comparison

• Normalize line endings before comparing files from different operating systems.
• Toggle whitespace ignoring when diffing minified, auto-formatted, or YAML files.
• Use unified mode for reviewing long-form text and side-by-side mode for code.
• When reviewing generated output, diff against a known-good baseline to isolate regressions.

Frequently Asked Questions

Can I compare entire files?

Yes. Paste the full contents of each file or upload via your clipboard manager, and the diff will run client-side.

Is my data secure?

All diff processing happens locally within your browser. No text is transmitted to any server, keeping proprietary code and confidential documents private.

Can I share the diff?

Use the “Copy diff” or “Download patch” buttons to pass the results to teammates, attach them to tickets, or commit them to your repository.

Related Comparison Utilities

• JSON Formatter – prettify and validate API responses before diffing them.
• CSV to JSON Converter – normalize CSV data before comparing rows.
• Regex Tester – craft expressions that help you clean input data before running a diff.