Compare two texts side by side with instant diff highlighting. See exactly what changed between versions — line by line and character by character. 100% browser-based, nothing uploaded.
Whether you're reviewing code changes, comparing document revisions, or checking copied content, a diff checker makes it easy to spot differences. Instead of manually scanning two texts, the tool highlights every addition, deletion, and modification in color-coded output.
What is a text diff checker?
A text diff checker compares two pieces of text and highlights the differences between them. It shows additions, deletions, and modifications, making it easy to spot what changed.
Is online diff checking private?
Yes — browser-based diff checkers process everything locally. Your text never leaves your computer. No upload, no server storage, no tracking.
What types of diff are supported?
Both line-by-line diff and character-level diff are supported. Added lines are highlighted in green, removed lines in red, and modified sections are shown inline.
How many lines can I compare?
The free version supports up to 500 lines of text comparison. The PRO version removes this limit for unlimited comparison.