Online Text Compare Tool — Side-by-Side Diff Viewer
This Text Compare (Diff Viewer) tool allows you to compare two blocks of text side-by-side and visually identify the differences using color-coded highlights. Whether you're a developer comparing code, a writer reviewing paragraph variations, or a student checking edits, this tool provides a fast and intuitive way to spot changes. It highlights added lines, removed lines, modified lines, and identical lines with different colors, making comparisons extremely easy to understand.
The tool runs entirely in your browser, ensuring privacy and speed. No text is uploaded or stored anywhere on a server. This makes it suitable for confidential comparisons such as contracts, source code, meeting notes, legal documents, or sensitive data. With just one click, you can compare two documents and scroll through the differences in real-time.
This diff viewer works for multiple use cases including comparing programming files, Markdown, essays, logs, configuration files, pasted content from emails, or any plain text. The whitespace-ignore option is especially useful when formatting changes introduce unnecessary differences. When enabled, the tool normalizes spacing so you can focus only on meaningful changes.
The output is displayed in two side-by-side panels: Text A and Text B. Each panel highlights the status of each line—added, removed, modified, or unchanged. This visual representation is similar to diff tools used by professionals in software development and version control systems. With a clean UI and no distractions, the tool gives you a clear comparison experience.
How to Use This Text Compare Tool
- Enter or paste content into the **Text A** and **Text B** boxes.
- Enable **Ignore whitespace** if you want to ignore minor spacing differences.
- Click the **Compare** button to generate the diff.
- Scroll through the side-by-side comparison to review the highlights.
- Added, removed, changed, and matching lines are marked with different colors.
Frequently Asked Questions (FAQ)
1. Does this tool upload my text anywhere?
No. Everything works locally in your browser, ensuring complete privacy.
2. Can it compare code?
Yes, it is widely used for comparing code snippets, scripts, and configuration files.
3. What does “Ignore whitespace” do?
It removes unnecessary spacing differences so only meaningful text changes are highlighted.
4. Can this tool detect changed words?
It highlights changed lines. For detailed word-level diff, a future update may be added.
5. Is this tool free to use?
Yes, it is completely free with no login or installation required.
6. Does it work on mobile?
Yes, the tool is fully responsive and works on all devices.
7. Can I compare big documents?
Yes, as long as your browser can handle them. The tool works efficiently for large text blocks.
8. Why are some lines marked as “missing”?
This means the line exists in one text block but not in the other.
9. Can I use it for legal and confidential documents?
Yes, since no data leaves your device, it is safe for private content.
10. Does this tool support dark mode?
Currently not, but a dark theme may be added in future versions.