+ 0 added− 0 removed
Line-by-line diff between two texts with add/remove stats.
Your vote is saved on this device only.
Diff Checker compares two blocks of text line by line and highlights exactly what changed between them. Paste an original and a revised version, and the tool marks added and removed lines and reports how many lines were inserted and deleted, so you can review edits without manually scanning for differences.
It is built for developers, writers, and reviewers who need to spot changes in config files, logs, code snippets, or documents. Because it runs entirely in your browser, the text you paste never leaves your device and is never uploaded to a server. It is completely free, requires no account, and works without sending anything over the network.
No. The comparison happens entirely in your browser, so both texts stay on your device and nothing is sent to a server.
It compares the two inputs line by line, marking lines that appear only in the revised text as added and lines that appear only in the original as removed.
They report the number of lines inserted and the number of lines deleted between the two versions, giving you a quick sense of how much changed.
Yes. Any plain text works, including source code, configuration files, and logs, since the diff operates on the lines you paste.
No. The Diff Checker is free to use with no account or registration required.