Compare two texts side by side and see additions, deletions, and word-level changes highlighted.
A diff (difference) checker compares two pieces of text — usually two versions of the same file — and shows what changed. Lines added in the modified version are shown in green; lines removed are shown in red. With word-level highlighting enabled, character-level changes inside changed lines are highlighted too.
This tool uses the Myers diff algorithm via the jsdiff library — the same algorithm used by Git for its diff and merge engines.
No. Comparison runs entirely in your browser; nothing is sent to any server.
Want more detail? Read How to Use Text Diff Checker: Practical Guide and Best Practices.