Text Diff Checker
Compare two text blocks and highlight differences line by line.
What is the Text Diff Checker Tool?
Our free online Text Diff Checker compares two blocks of text side-by-side to highlight differences, additions, and deletions. It is a simple tool for checking document drafts or source code changes.
How to Use Text Diff Checker
- 1Paste the original text in the left Input box.
- 2Paste the modified text in the right Input box.
- 3Review the highlighted additions (green) and deletions (red) in the diff viewer.
Common Use Cases
- •Comparing code revisions to locate formatting bugs.
- •Reviewing article revisions to trace content updates.
- •Verifying changes in server configuration files.
🔒 Privacy & Processing Notice
This tool processes all data entirely in your browser using client-side JavaScript. Your input is never uploaded to any server, ensuring 100% privacy and confidentiality. No data is stored, logged, or transmitted.
Frequently Asked Questions
How is text diff calculated?
The tool parses texts into lines or words and uses diff matching algorithms to identify insertion and deletion regions.
What do the red and green highlights mean?
Red highlights represent characters deleted from the original text, while green highlights indicate newly added text.
Does the diff checker save my data?
No, comparisons are executed entirely in your local browser.
Is Text Diff Checker free to use?
Yes, Text Diff Checker is 100% free with no signup required.
Is my data safe?
All processing happens in your browser. Your data never leaves your device.
Does it work offline?
Once the page loads, Text Diff Checker works entirely client-side.