Text Diff

Yes, completely free with no account or signup required.

All processing is local in your browser. Your text is never uploaded to any server.

Unified diff, side-by-side diff, word-level highlighting, line count stats, and a swap button.

A diff compares two pieces of text line by line and highlights which lines were added, removed, or unchanged. It is the same algorithm used by Git and code review tools.

Unified diff shows both versions in a single pane with + and - prefixes. Side-by-side shows the original on the left and the modified text on the right, making changes easier to scan visually.

Word-level diff highlights the specific words that changed within a modified line, rather than marking the entire line as changed. Enable it with the Word diff toggle.

Paste the original code into the left panel and the modified code into the right panel. Switch to Side-by-side view for an easier code review experience.

The tool uses the Myers diff algorithm, the same algorithm used by Git. It finds the shortest edit script — the minimum number of additions and deletions to transform one text into the other.

Yes. Paste the two conflicting versions of a file and the diff will clearly show which lines differ, helping you resolve the conflict manually.

Paste your JSON or XML into both panels. For cleaner diffs, format both sides first using the JSON or XML formatter on this site before comparing.

The stats bar shows the number of added lines (green), removed lines (red), and unchanged lines. Only real content lines are counted — blank lines are included if present.