Text Diff Checker is a free online tool that compares two blocks of text line by line and highlights the differences. Added lines are shown in green, removed lines in red, and unchanged lines in white.
A text diff checker uses the Longest Common Subsequence (LCS) algorithm to compare two texts and identify which lines were added, removed, or unchanged. It is an essential tool for developers reviewing code changes, writers comparing document revisions, and anyone needing to spot differences between two versions of text.
Text Diff Checker
Compare two texts and highlight the differences line by line.
How to Use
- Paste the original text into the left input field
- Paste the modified text into the right input field
- Click Compare
- Review the highlighted diff output: green for added, red for removed
Example
Input
Original: Hello World | Modified: Hello Earth
Output
Hello - World + Earth
FAQ
- How does Text Diff Checker work?
- It uses the Longest Common Subsequence algorithm to compare texts line by line and highlight additions and deletions.
- Is this tool free?
- Yes, it is completely free with no registration required.
- Does this tool run in the browser?
- Yes, all comparison happens locally in your browser with no data sent to a server.