Does the diff run line by line or word by word?

Both modes are supported where the tool exposes them — line-level highlights show changed rows; word-level view helps spot typos inside one line.

Can I compare large documents?

Yes for typical article-length text. Very large pastes may slow down the browser because comparison is done client-side.

Are whitespace-only changes shown?

Yes. Leading, trailing, or doubled spaces can produce highlights when line or word granularity includes them.

Is either version stored on a server?

No. Left and right panels stay in your browser memory only.

Can I paste from PDF or Word?

Yes, but hidden formatting may add unexpected characters. Paste as plain text if results look wrong.

Does it merge changes automatically?

No. The Text Diff Checker only visualises differences; merging is manual.

Can I export the diff?

Use your browser to copy highlighted sections or screenshots. There is no server-side export.

Does it work offline?

After the first load, comparisons work without network access.

Text Diff Checker

Text Live

Compare two texts and highlight added, removed and changed lines.

About this tool

Text Diff Checker — Compare two texts and highlight added, removed and changed lines. Free, fast and private. Runs entirely in your browser at Quick Calci Too

Examples

Common scenarios for the Text Diff Checker.

Spot a typo

Diff two near-identical sentences.

left: Ship it on Friday.
right: Ship it on Saturday.

Friday → Saturday (1 word changed).

Compare two configs

left: port=8080 host=localhost
right: port=9090 host=localhost

Line 1 changed: port=8080 → port=9090.

Who uses the Text Diff Checker?

Common scenarios and audiences for this tool.

Developers

Compare config snippets, env files, or small JSON blobs before deploy.

Editors & proofreaders

Spot unintended edits between two drafts of the same article.

Support teams

Verify what changed between two versions of a customer-supplied log or email.

Students

Review revision differences between essay drafts without shared cloud accounts.

Translators

Check that only intended segments changed between source and back-translation samples.

Frequently asked questions

Everything you need to know about the Text Diff Checker.