Seam beta
A fast, native file and folder comparison and merge tool for macOS
Features
Side-by-Side Text Compare
Word-level highlights, syntax colors, soft wrap, find and replace, go to line, and an overview ruler. Edit either side and the diff updates as you type.
Folder Compare and Sync
Compare by content, size or time, filter by name or .gitignore, then copy, move, delete to the Trash or sync, each with a preview and an undo.
Three-Way Merge
Left, base and right with an editable result. Changes that don't clash resolve themselves, even different words of the same line. Works as a git merge tool.
Hex, Table, Picture and Patch
Compare binaries as hex, CSV and TSV by key columns, images side by side or as a difference, and review a patch hunk by hunk before applying it.
Documents and Media Tags
Compare .docx, .odt, .xlsx and .rtf as text, and the tags and properties of audio and video files.
Command Line and Git
Headless compares with exit codes, HTML and PDF reports, folder sync and scripts. Use it as your git difftool and mergetool.
Safe by Default
Nothing is overwritten or deleted without a preview, replaced files are backed up, and unsaved work is offered back after a crash.
Native and Fast
One binary, GPU-rendered, no Electron or web view. Light and dark themes follow your system.
Download
Seam requires macOS 11.0 (Big Sur) or later. Universal binary for Intel and Apple Silicon.
Seam
LatestUniversal binary (Apple Silicon + Intel)
- Signed and notarized by Apple
- Early beta release, built for macOS
If your browser blocks the download, click "Keep" or "Keep anyway" in the download bar. The app is signed and notarized by Apple for your security.