Question 1

What's the difference between line and word diff?

Accepted Answer

Line diff highlights entire lines that were added or removed. Word diff breaks the comparison down to individual words, which is useful for spotting small edits inside an otherwise unchanged line.

Question 2

Can I diff two files instead of pasting text?

Accepted Answer

Not yet — this tool is paste-only for now. You can copy a file's contents into either box.

Question 3

Is my text sent anywhere?

Accepted Answer

No — the comparison runs entirely in your browser using a bundled diffing library. Nothing you paste is ever uploaded.

Question 4

Why does a single changed word show the whole line as different?

Accepted Answer

That's line mode's normal behavior — switch to word mode to see exactly which word changed within an otherwise identical line.

Question 5

Is there a size limit?

Accepted Answer

No hard limit is enforced, but very large inputs (tens of thousands of lines) may be slow to diff since everything runs on your device rather than a server.

Text Diff Checker

Frequently asked questions