Free diff checker to compare code, text, or config files. Visualize changes in split or unified views.
| 1 | // Original code | 1 | // Modified code |
| 2 | function hello() { | 2 | function hello() { |
| 3 | console.log("Hello, world!"); | 3 | console.log("Hello, React!"); |
| 4 | console.log("Hello, Next.js!"); | ||
| 4 | } | 5 | } |
Instantly spot changes between different versions of your code, documents, or configurations with our diff viewer. Works with code in any language as well as plain text, and offers both split and unified viewing modes. Ideal for developers reviewing code changes, system administrators comparing config files, or content creators tracking document revisions. Just paste your content and see exactly what changed.
A diff is a line-by-line comparison of two versions of a text that shows which lines were added, removed or left unchanged. Developers use diffs to review code changes, and the unified diff format is what Git and patch tools read and write.
Split view puts the original and modified versions side by side, which makes edits in long files easy to follow. Unified view stacks them in one column, with removed lines followed by added lines, the same layout Git shows in a terminal.
Yes. Copy Diff copies the comparison in unified diff format with three lines of context around each change, labelled with original and modified file names, so you can paste it into a code review, ticket or chat.
The diff is calculated in your browser, so comparing two texts sends nothing to a server. One exception: the Copy buttons above Original Text and Modified Text record the copied text in usage analytics, so select and copy sensitive content yourself instead.
