Compare Two Texts Instantly
This diff checker highlights exactly what changed between two versions of any text or code. Paste an original and a modified version, and it computes a precise, line-by-line comparison — additions in green, deletions in red, and modified lines in yellow — updating live as you type.
Side-by-Side or Unified
Use split view to review the two versions in parallel columns with line numbers, or unified view for a compact, git-style stream of changes. Toggle ignore case and ignore whitespace to focus only on the differences that matter.
Great for Code Reviews
Because it compares by line, the diff checker is perfect for reviewing source code, JSON, YAML, config files, and logs. Everything runs locally in your browser, so even proprietary code never leaves your machine.