Key Features

GitHub-Style Display

Side-by-side split view or unified view with line numbers, just like GitHub compare.

Multiple Granularity

Line, word, and character-level diff with inline highlighting of exact changes.

Privacy Protected

Your text never leaves your browser. All comparison happens locally.

How to Use Text Diff Checker

Paste Two Texts

Enter the original text in the left box and the modified text in the right box.

Choose View Mode

Select Unified (single column) or Split (side-by-side) view, and pick Line/Word/Char granularity.

View Differences

See highlighted differences with line numbers — red for removed lines, green for added lines, matching the GitHub compare style.

Frequently Asked Questions

Basics

What is a text diff checker?

A text diff checker compares two pieces of text and highlights the differences between them, showing what was added, removed, or changed.

What diff modes are available?

We offer Line Diff (compares line by line), Word Diff (compares word by word), and Character Diff (shows exact character-level changes).

Features

What is the difference between Unified and Split view?

Unified view shows all lines in a single column with +/- markers, similar to git diff output. Split view shows original on the left and modified on the right side-by-side, similar to GitHub's compare view. Choose whichever you prefer for reading the diff.

Can I copy the diff output?

Yes, you can copy the diff result to your clipboard or download it as a text file using the Copy and Download buttons.

Is there a text size limit?

The tool runs entirely in your browser, so the only limit is your browser's memory. It can handle large texts efficiently.

Free Text Diff Checker Online