Does it compare word by word?

This tool compares line by line, which works well for code, configs, and multi-line documents.

Can I diff very large files?

Large texts may slow the browser slightly, but there is no file size limit beyond your device memory.

Red with strikethrough means content removed from the original. Green means content added in the changed version.

Compare two texts side by side with highlighted additions and deletions.

Original

Changed

Diff

Line

The quick brown fox

jumpsleaps over the lazy dog.

Removed · Added · Modified (word highlight)

1
Paste the original text
Enter or paste the baseline version in the Original field on the left.
2
Paste the changed text
Enter the revised version in the Changed field. Differences appear automatically below.
3
Review highlighted changes
Removed lines appear in red with strikethrough. Added lines appear in green.

No. The diff is computed locally in your browser using the diff library.

Count words, characters, sentences, paragraphs, and estimated reading time.

Convert text to uppercase, lowercase, title case, camelCase, and more.

Create strong random passwords with customizable length and character sets.

Convert Markdown to HTML with a live preview and copy-ready output.

Generate placeholder paragraphs, sentences, or words for mockups and drafts.

Clean up text by removing line breaks, extra spaces, or converting breaks to spaces.