Question 1

What does Text Diff Checker do?

Accepted Answer

It compares two blocks of text and highlights what's added, removed, or changed, either side-by-side or inline.

Question 2

Is my text uploaded anywhere for comparison?

Accepted Answer

No — the comparison runs entirely in your browser, so you can safely diff sensitive code, config files, or logs without them being transmitted anywhere.

Question 3

Why are lines flagged as different when they look identical?

Accepted Answer

Invisible differences like trailing whitespace, extra spaces, or different line endings can make visually identical lines register as changes — a common source of confusing diffs.

Question 4

Can I diff very large files?

Accepted Answer

The tool is built for comparing snippets, config files, or moderate-length documents; extremely large inputs can get slow to render and harder to read visually.

Question 5

Is Text Diff Checker free to use?

Accepted Answer

Yes, it's free and requires no account.

Frequently asked questions about Text Diff Checker

What does Text Diff Checker do?

Is my text uploaded anywhere for comparison?

Why are lines flagged as different when they look identical?

Can I diff very large files?

Is Text Diff Checker free to use?