OmniSave

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What OmniSave is

OmniSave is a free, open-source game-save synchronization tool that runs as a launch wrapper. It places saves in a game’s local directory before launch and backs them up after the game exits. Save data can remain on a portable drive or in a cloud-synced folder while the game uses its expected local path. Process polling keeps OmniSave active when a launcher detaches or starts background child processes, and arbitrary launch arguments are supported. Configuration accepts ~/ expansion for user-profile directories and ./ for relative portable paths. Mutex locking prevents multiple OmniSave instances from running simultaneously to help avoid save corruption. The maker reports testing on Windows 10, macOS through CrossOver and Wine, and Android through GameHub with Winlator/Box64. Native Linux and Steam Deck support with Proton prefix detection is listed on the roadmap. Version 0.2.0 added atomic temporary-file writes and propagation of local save deletions to the remote path. The project uses the MIT license and provides no warranty.

Who it suits

OmniSave suits players who want to carry game saves between machines using one folder, portable drive, or cloud-synced location. It is useful across Windows, macOS, and Android setups with the documented compatibility layers.

What it does well

Pre-launch save synchronization
Post-exit automatic backups
Portable and cloud-synced storage options
Process monitoring for detached launchers
Single-instance protection

What to know first

Native Linux support is only roadmap work
Steam Deck Proton detection is roadmap work
Game detection is manual
MIT license supplies no warranty

Limits

Native Linux and Steam Deck support with Proton prefix detection is listed as roadmap work. Game identification must be handled manually.

Getting started

Open the OmniSave GitHub website
Use it on Android, macOS, or Windows
Choose a portable drive or cloud-synced folder for save data
Configure the game’s local and remote paths
Set any required launch arguments
Start the game through OmniSave

Verdict

OmniSave centers on portable save handling with automatic pre-launch synchronization and post-exit backups. Its documented platform paths are broad, but native Linux and Steam Deck support are not yet available, and game identification remains manual.

Questions

Is OmniSave free?

Yes. It is free and open source, with an MIT license.

Which platforms does OmniSave support?

Its listed platforms are Android, macOS, and Windows.

Where can save data be stored?

Save data can live on a portable drive or in a cloud-synced folder while the game uses its local save path.

Does OmniSave detect games automatically?

No. Game detection is manual.

What compatibility tools are documented?

Documented compatibility includes CrossOver, Wine, GameHub, Winlator, and Box64.

Facts from OmniSave's own pages

Audience: The maker describes the tool as intended to let users carry a gaming session in one folder or drive across machines without manual save management. · github.com, 9 Oct 2026
Compatibility: The maker says it is designed for Windows and tested on Windows 10, macOS through CrossOver and Wine, and Android through GameHub with Winlator/Box64. · github.com, 10 Oct 2026
Game monitoring: Process polling lets OmniSave keep running when a game launcher detaches or spawns background child processes. · github.com, 9 Oct 2026
Instance protection: Mutex locking prevents multiple OmniSave instances from running at the same time to avoid save corruption. · github.com, 9 Oct 2026
Integrations: Documented compatibility includes CrossOver, Wine, GameHub, Winlator, and Box64. · github.com, 9 Oct 2026
Intended use: The maker says OmniSave is inspired by PortableApps and is intended to let users carry a game session’s saves between machines in one folder or drive. · github.com, 10 Oct 2026
Launch options: Its configuration supports arbitrary game launch arguments, including flags such as -nobattleye and -windowed. · github.com, 10 Oct 2026
Linux support: Native Linux and Steam Deck support with Proton prefix detection is listed as roadmap work. · github.com, 10 Oct 2026
Notable limit: Native Linux and Steam Deck support with Proton prefix detection is listed on the roadmap. · github.com, 9 Oct 2026
Path configuration: Configured paths support ~/ expansion for user profile directories and ./ for relative portable paths. · github.com, 10 Oct 2026
Path support: Configuration paths support ~/ expansion for user profile directories and ./ for relative portable paths. · github.com, 9 Oct 2026
Portable storage: Save data can live on a portable drive or in a cloud-synced folder while the game uses its expected local save path. · github.com, 9 Oct 2026
Process monitoring: OmniSave polls the process list so it can remain active when a game launcher detaches or starts child processes. · github.com, 10 Oct 2026
Purpose: OmniSave is a portable game save synchronization tool that redirects saves between a portable location and the system path a game expects. · github.com, 10 Oct 2026
Safety: Version 0.2.0 changelog lists atomic file writes via temporary .omnitmp files and propagation of local save deletions to the remote path. · github.com, 9 Oct 2026
Security and compliance: The repository identifies the project as MIT licensed and does not state a security certification or compliance standard. · github.com, 9 Oct 2026
Security and warranty: The repository provides an MIT license that grants use, copying, modification, and distribution rights and supplies the software without warranty. · github.com, 10 Oct 2026
Single-instance safeguard: Mutex locking prevents multiple OmniSave instances from running at the same time to avoid save corruption. · github.com, 10 Oct 2026
Storage: The project describes portable drives and cloud-synced folders as possible locations for save data. · github.com, 10 Oct 2026
Support: The repository page includes a “Support This Project” section but does not state a support service or response commitment. · github.com, 9 Oct 2026
Sync behavior: Version 0.2.0 added atomic file writes and propagation of local save deletions to the remote path during post-sync. · github.com, 10 Oct 2026
Workflow: It syncs saves before launching a game, monitors the game process, then syncs saves back after the process exits. · github.com, 10 Oct 2026

Where OmniSave stands on Freedom251

Game Save Managers#14 of 27