differenceDev Tools
Code Diff Checker
Compare two code blocks and see the differences highlighted.
Original Code
Modified Code
Compare two code blocks and see the differences highlighted.
The Code Diff Checker compares two blocks of text or code side by side and highlights exactly what changed between them — added lines in green, removed lines in red, and unchanged lines in neutral. This kind of visual diff is the same mechanism used by version control systems like Git to show changes between commits, but here it is available instantly in the browser without any setup. Whether you are reviewing a configuration file edit, comparing two versions of a function, checking what changed in a contract or document, or verifying that a refactoring preserved behavior, a visual diff saves significant time over manual line-by-line reading. Paste both versions and the diff appears immediately, making it easy to spot even subtle whitespace or punctuation differences.
Paste the original (or older) text into the left panel and the modified (or newer) text into the right panel, then click Compare. Added lines are highlighted in green and removed lines in red. Scroll through the result to review every change at a glance.