Text Diff Checker

What is a text diff checker?

It compares two documents line by line and aligns them so matching lines stay paired. Lines that appear only in the first text are marked as removed, lines that appear only in the second are marked as added, while identical lines remain unhighlighted.

How should I use it?

• Paste the original text into the left box and the new version into the right box.
• Review the side-by-side view: amber removals on the left, green additions on the right.
• Check the summary tiles for total, added, removed and unchanged line counts.

Line or character granularity

Line-by-line diff highlights whole changed rows — ideal for code and configs. Word and character diff zooms into exactly what changed inside a sentence — better for copy editing and proofreading tweaks.

A clean review workflow

Paste the original and the edited version side by side, then scan only the highlighted hunks. That focused review catches accidental deletions that a full re-read of the file often misses — especially after automated edits.

How to use Text Diff Checker

Paste two versions of a text to see exactly which lines were added or removed.

Use the controls above to provide your input or choose options, then review the result on the page.

Why use our Text Diff Checker

• Compares two texts line by line and highlights added, removed and unchanged lines side by side.
• Complete the task with a focused Text Diff Checker workflow instead of switching between apps.
• Open it in your browser and get started—no account or installation required.