A fast, modern archive manager for Windows — a practical WinRAR alternative.

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Syncinit reads and writes .init (its own branded, ZIP-compatible format), .zip, .tar and its compressed variants, and reads .7z. It integrates into the Windows Explorer right-click menu, supports AES-256 PIN protection, and ships with no telemetry and no network calls.

Supported formats

• Read/extract: .init, .zip, .tar, .tar.gz/.tgz, .tar.xz/.txz, .tar.zst, .tar.bz2/.tbz2, and .7z
• Create: .init, .zip, .tar, .tar.gz, and .tar.zst

Syncinit does not create proprietary .rar files. .init is the branded, ZIP-compatible alternative — readable by Syncinit, and by any ZIP tool that checks file signatures rather than trusting the extension.

Download

Get the latest Windows installer from the Releases page. Run the installer and Syncinit adds itself to the Explorer right-click menu automatically — no separate setup step.

Full version history: RELEASES.md

Security & privacy

• AES-256 encryption (real AES, not legacy ZipCrypto) for password/PIN-protected archives
• No telemetry, no analytics, no network calls of any kind
• See PRIVACY.md for the full policy

License

Syncinit is proprietary software — see LICENSE. Free to download and run; not free to copy, redistribute, or modify and re-release. Built on open-source components, each under its own license — see THIRD-PARTY-NOTICES.md.

Support

Syncinit is free. If you find it useful, a donation link may be here — purely optional, nothing is gated behind it.