Diff Anything is a local-first desktop comparison app for macOS and Windows. Compare spreadsheet data across XLSX, ODS, Apple Numbers, CSV, and TSV files without converting formats first. It compares stored cell values, so you can focus on the data even when the source formats differ.

For folders, use a two-pane review with search, filters, moved-file detection, ignore rules, and safer synchronization plans. PDF comparison gives you two explicit choices: visual page diff for changes to charts, images, signatures, stamps, and layout; or extracted-text diff for wording changes.

Text, JSON, source code, images, directories, and more use purpose-built comparison views. CLI and Git difftool modes bring the same workflow to scripts and source control. Files stay on your computer: no accounts, uploads, cloud comparison, analytics, or telemetry.