📝 Text & Code Diff Checker
Quickly compare two text or code files to highlight the differences.
About Diff Checker
Our Online Diff Checker provides visual side-by-side and inline difference comparison for source code, configuration files, SQL queries, JSON payloads, and text documents. Instantly spot additions, deletions, and character-level modifications between two versions of your work.
100% client-side JavaScript execution guarantees that proprietary source code, confidential contract drafts, and sensitive API payloads never leave your local machine.
💡 How to Use the Diff Checker
- Paste Original Text: Enter your original text or code into the left pane.
- Paste Modified Text: Enter the updated version into the right pane.
- Inspect Visual Diff: The tool automatically computes differences, highlighting added text in green and removed text in red with line numbers.
⚡ Key Features & Capabilities
✨ Character & Line Highlighting
Pinpoint exact word, character, and whitespace modifications effortlessly.
✨ Side-by-Side & Unified Views
Toggle between split-screen dual view and unified inline diff.
✨ Zero Server Uploads
All diff computation executes in browser RAM for complete data security.
🎯 Common Use Cases
- Software Engineers: Review Git pull requests, code patches, and config changes before deployment.
- Legal & Contract Reviewers: Compare contract clauses and redline versions for unapproved modifications.
- Writers & Editors: Track editorial changes and revisions between article drafts.
Frequently Asked Questions
What diff algorithm is used?
Our tool implements the Myers diff algorithm, the gold-standard difference calculation engine used by Git and Unix diff utilities.
Can I compare code files with thousands of lines?
Yes! The client-side diff engine handles large code files with thousands of lines smoothly.