Text Diff Checker
Runs entirely in your browser
Compare two blocks of text line by line and see exactly what was added, removed or left unchanged. Everything happens directly in your browser.
How to use Text Diff Checker
- Paste the original text into the left box and the changed text into the right box.
- Turn on Ignore case or Ignore whitespace if you want those differences skipped.
- Click Compare Text.
- Review the line-by-line result below — added lines are green, removed lines are red.
Features
- Line-by-line comparison that highlights added and removed lines.
- Optional case-insensitive and whitespace-insensitive comparison.
- Summary counts for added, removed and unchanged lines.
- 100% client-side — your text never leaves your browser.
Why use Toolbeel Text Diff Checker?
- Free to use, with no sign-up or limits.
- Quickly spot what changed between two drafts, configs or code snippets.
- Ignore case or whitespace to focus only on the differences that matter.
- Works on any device with a modern browser — desktop, tablet or phone.
- Keeps your text private — nothing is uploaded or stored.
Is Text Diff Checker safe?
Yes. Text Diff Checker compares your text entirely in your browser. The text you paste is never uploaded to our servers or any third party, nothing is stored once you close or refresh the tab, and no account or personal information is required to use it.
Frequently Asked Questions
How does Text Diff Checker compare text?
It compares the Original and Changed text line by line and finds the longest sequence of lines they share, then marks every remaining line as added or removed.
Can I ignore case or whitespace differences?
Yes. Turn on Ignore case to treat "Hello" and "hello" as the same line, or Ignore whitespace to ignore extra spaces and leading/trailing spaces when comparing.
What do the + and − marks mean?
A green line marked with + only appears in the Changed text. A red line marked with − only appears in the Original text. Lines with no mark are unchanged.