Free, open-source incremental backup software for Windows that stores backups as ordinary browsable files.
Fast-Backup copies only files that have changed after the first backup. It stores backups as ordinary files and folders instead of using a proprietary archive, supports file history and point-in-time restore, and can run through its graphical interface or command line.
Fast-Backup 4.01 is the first open-source release. The Windows installers are digitally signed, and the source code is available under the MIT License.
| Publisher | Acclaim Software Ltd |
|---|---|
| Version | 4.01 |
| Release date | 2026-08-25 |
| License | MIT |
| Installer type | inno |
| Architecture | x86, x64 |
| Package ID | AcclaimSoftware.Fast-Backup |
| Install scope | All users |
winget install --id=AcclaimSoftware.Fast-Backup -ewinget upgrade --id=AcclaimSoftware.Fast-Backup -ewinget uninstall --id=AcclaimSoftware.Fast-Backup -e"Fast-Backup401_64.exe" /VERYSILENT /SUPPRESSMSGBOXES /NORESTART /SP-Yes. Fast-Backup is free and open-source software released under the MIT license.
The latest version is 4.01, released on Aug 25, 2026.
The download button links to the official installer published on github.com, the same file Windows Package Manager installs. You can verify the downloaded file by comparing its SHA-256 checksum with 8133035384c929c5b78719b11857638894cc6a9ff4281e23bf5e3678de57995f.
Fast-Backup runs on Windows and is available for 32-bit (x86), 64-bit (x64) systems.
Run the offline installer with "Fast-Backup401_64.exe" /VERYSILENT /SUPPRESSMSGBOXES /NORESTART /SP-, or install it with Windows Package Manager: winget install --id=AcclaimSoftware.Fast-Backup -e --silent.
Open Settings › Apps › Installed apps, find Fast-Backup and select Uninstall. From the command line, run winget uninstall --id=AcclaimSoftware.Fast-Backup -e.
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