What is Sigma File Manager?

Sigma File Manager is a free, open-source, modern file manager (explorer/browser) app for Windows and Linux, with macOS support available by building from source. Designed and maintained by Aleksey Hoffman, it offers a rapidly evolving alternative to default file explorers with a focus on speed, extensibility, and modern UI features.

Who it's for

• Power users who need fast, keyboard-driven file navigation with global shortcuts and a command palette
• Developers and IT professionals managing remote servers, LAN shares, or WSL drives alongside local files
• Customization enthusiasts who want to personalize their file manager with themes, visual effects, and extensions from a built-in marketplace

Key features

Smart global search

Finds files and folders in seconds — searching a full 1TB drive takes about 2 seconds. Its typo correction system handles misspellings, wrong case, wrong word order, missing words, symbols, and even missing file extensions.

Split view and tabs

Keep multiple directories open in tabs and switch between them instantly. Any tab can be split into two independent panes, making file transfers between folders smooth and intuitive.

Extensions and marketplace

Install extensions directly from the built-in marketplace or from local folders. Extensions can add commands, pages, shortcuts, settings, and more — including video downloading from 1000+ sites, media conversion, and image optimization.

LAN file sharing and network locations

Share or stream files over your local network with browser access, QR codes, and FTP support. For advanced users, network locations (Alpha stage) support SSHFS, NFS, SMB, and CIFS connections.

What stands out

"Sigma File Manager reimagines file browsing as a fast, extensible platform — not just a folder viewer."

The combination of sub-second search across terabytes, a full extension marketplace, and built-in LAN sharing sets Sigma apart from traditional file managers. It replaces Windows File Explorer for most everyday tasks while adding power-user features like split panes, WSL drive access, and a command palette — all in a free, open-source package that evolves rapidly.

Worth checking out if…

You're tired of slow, limited default file explorers and want a free, open-source alternative that combines blazing-fast search, tabbed browsing, split views, and extensibility through plugins. It's especially valuable if you work across local and network drives, need keyboard-centric navigation, or want to customize your file manager with themes and visual effects.