File Comparator - Diff Tool
Compare two text files side-by-side to spot differences instantly. Our free File Comparator highlights changes locally, keeping your proprietary code and documents 100% private.
What is the File Comparator?
Whether you are a developer looking for a changed line of code, or an editor comparing two versions of a legal contract, finding the exact differences manually is nearly impossible. This File Comparator (or 'diff' tool) automates the process. You upload the 'Original' file and the 'Modified' file, and the tool places them side-by-side, visually highlighting additions in green and deletions in red. Because comparing proprietary source code or private contracts requires absolute security, this tool performs the entire comparison directly in your web browser. Nothing is ever sent to our servers.
Why Use Our File Comparator?
- Side-by-Side View: Easily see exactly what was added, removed, or altered.
- Syntax Highlighting: Color codes the differences for instant recognition.
- 100% Private: Your files are parsed locally and never leave your computer.
- Developer Friendly: Perfect for reviewing code changes before a Git commit.
How to Use the File Comparator
Upload or paste the original text into the Left pane.
Upload or paste the modified text into the Right pane.
The tool instantly highlights the differing lines.
Scroll through the document to review all changes.
Frequently Asked Questions
No, this specific tool is designed to compare plain text, code, JSON, and XML files.
Yes. The diff algorithm is executed by client-side JavaScript. We do not have a backend database to store your files.
Currently, this is a read-only viewer designed to highlight differences, not a merge conflict resolution tool.
All file processing is performed locally in your web browser. We do not upload, store, or view your data.