A diff checker compares two versions of text and shows what changed — which lines were added and which were removed. This tool does it instantly in your browser, line by line, so you can spot every difference at a glance.
How to use it
- Paste the original text on the left.
- Paste the changed text on the right.
- Differences are highlighted below — green for additions, red for removals.
About Text Diff Checker
Comparing two versions of something — a config before and after an edit, two API responses, a pasted snippet versus what you expected — is a daily need. Reading them side by side and spotting changes by eye is slow and unreliable. A line diff makes every addition and deletion obvious. Use it to review changes, find what broke, or confirm two files are identical. The comparison runs entirely client-side, so sensitive content stays private.
FAQ
Does it diff word by word?
This tool compares line by line, which is ideal for code and structured text. Whole lines are marked added or removed.
Is my text uploaded?
No. The comparison happens entirely in your browser.
Does the diff checker compare line by line or character by character?
It highlights every difference between the two blocks, showing added, removed and changed segments so you can spot exactly what changed — useful for comparing config files, code snippets, or two versions of the same text.