Paste the original and the changed version, or open two files. Every added, removed and changed line is highlighted, down to the word.
A diff checker puts two versions of a text next to each other and shows what changed between them. "Diff" is short for difference, after the command programmers have used for decades to compare files.
You don't need to be a programmer to use this one. Paste a contract before and after the other side's edits, two drafts of an essay, or yesterday's and today's export, and see what's new, what's gone and what stayed the same. No sign-up.
Lines are matched the way Git matches them, so a sentence added near the top doesn't make everything below it look changed. Added lines are green, removed lines red, and inside an edited line only the words that differ are highlighted.
Read the result side by side or inline, jump from change to change, and let long unchanged stretches fold away. Case, spacing and blank lines can be ignored when they don't matter.
Open a file above each field or drop it in: .txt, .csv, .json, logs or source code, up to 20 MB. The comparison runs in your browser, so neither the files nor the text you paste leave your computer.
When you need the changes somewhere else, Copy Differences gives you a unified diff, the same format Git and patch use. Handy when Git feels like overkill or track changes was switched off.
A tool that compares two versions of a text and shows what changed between them: which lines were added, which were removed and which were edited. The name comes from diff, the command programmers use to compare files. This one does the same in your browser, with no installing and no sign-up.
Lines that were added, removed or changed. It works out which lines match up first, the way Git does, so a line inserted near the top does not make every line below it look changed. Inside a changed line, the words that differ are highlighted.
Removed lines appear in the first text only. Added lines appear in the second only. Changed lines exist in both, with different content on each side.
Almost always a difference you cannot see: a trailing space, a tab where the other side has spaces, a non-breaking space, or a zero-width character. The tool marks those inside the highlight, so you can see which one it is. Tick Ignore differences in spacing if they do not matter to you.
Only if you tick Ignore upper and lower case. By default a capital letter counts as a difference, because in code, data and file paths it usually is one.
Yes. Use Open file above each field, or drop a file onto it. Any plain-text file works, such as .txt, .csv, .json or source code. The file is read in your browser and never uploaded.
Open each one, select all, copy, and paste the text into its own field. Word and PDF files are not plain text, so they cannot be opened here directly. The comparison then covers the wording only, not fonts or layout. If both versions are Word files and you need the formatting compared too, Word's own Review, then Compare, does that.
No. The comparison runs entirely in your browser. Neither the text you paste nor the files you open are uploaded or stored, so it is safe for contracts, code and other material you would rather keep to yourself.
A unified diff, the format Git and patch use: removed lines start with a minus, added lines with a plus, and each change comes with three lines of context.
Yes. The comparison is plain text, so source code, CSV rows, log files and configuration files all work.
Files up to 20 MB. Texts tens of thousands of lines long compare in well under a second, and long unchanged stretches are folded away so the differences are easy to find.