Text Diff
Advanced text comparison with word-level and character-level diff highlighting.
Input
Output
Ready — enter input to start
Frequently Asked Questions
How do I use the Text Diff tool?
Enter two texts separated by "|||" on a single line. The text before "|||" is treated as the original, and everything after is treated as the modified version. For example: "Hello world|||Hello there" will compare "Hello world" against "Hello there" and highlight the changes.
What do the colored lines mean?
Green lines indicate content that was added in the modified version. Red lines indicate content that was removed from the original. Gray lines represent unchanged content. Line numbers help you reference specific locations in discussions with teams or for documentation.
Is my data sent to a server?
No. All comparison happens locally in your browser. The input text is parsed and compared entirely on your device using JavaScript. Your texts are never uploaded, making this safe for sensitive documents and proprietary code.
Can I copy the diff output?
Yes, click the Copy button to copy the diff output as plain text. You can also download the diff as a .txt file using the Download button. This is useful for generating reports, sharing comparison results, or archiving change documentation.
What's the difference between this and Diff Checker?
Both tools perform line-by-line comparison, but they have different input methods. The Diff Checker has two separate text areas side by side for easier comparison of long texts. This Text Diff tool accepts a single input with texts separated by "|||", which is useful for pasting comparison snippets from other sources.
What keyboard shortcuts are available?
Press Ctrl+Enter (or Cmd+Enter on Mac) to trigger the comparison without clicking the button. This is convenient when you've pasted your texts and want to quickly see the differences.