Text Difference Checker
Compare two texts and highlight changes.
Runs 100% in your browser — nothing is uploaded
Compare two blocks of text and see exactly what changed — added and removed lines highlighted side by side. Ideal for proofreading revisions, comparing drafts, or reviewing config changes. Runs in your browser; nothing is uploaded.
How to Check Text Diff Online?
Paste the original text on the left and the revised text on the right. The online text diff checker highlights added and removed lines instantly, so you can review the exact changes.
Frequently asked questions
How does it compare the text?
It performs a line-by-line difference, marking lines that were added or removed between the original and the changed version.
Is my text private?
Yes. The comparison runs entirely in your browser, so nothing is sent to a server.
What can I use it for?
Proofreading edits, comparing two drafts, checking contract changes, or reviewing configuration differences.
Does it show a count of changes?
Yes — it summarises how many lines were added and removed.
How do I check text diff online?
Paste the original and revised text into the two panels. The online text diff checker highlights added and removed lines immediately.
Related tools
Handy companions people often use alongside Text Diff Checker.