Software · Security & privacy

OpaqueFiles

File encryption software for cloud storage.

Completely free
Linux
Open source

Overview

OpaqueFiles is a file encryption program, available on Linux.

Features described in its Flathub listing: data encryption.

Overview written by LicitPro from the documentation published by the authors and the cited sources; we have not tried the resource ourselves.

Excerpts that establish this information

“File encryption software for cloud storage” — Flathub, 10 November 2026
“OpaqueFiles is a free and open-source project that can be used to encrypt data before uploading it to cloud providers or local storage.” — Flathub, 10 November 2026

At a glance

All of OpaqueFiles is free: no feature is locked behind a paid plan, and its code is open.

Its licence (GPL-3.0+) is a copyleft open source licence: you may use, study, modify and redistribute it, including commercially; modified versions must keep the same licence.

Strengths

Open source code
Commercial use allowed

About

OpaqueFiles is a free and open-source project that can be used to encrypt data before uploading it to cloud providers or local storage. Please also check out Cryptomator to see what suits you best. Features Encryption: ChaCha20-Poly1305 (default), AES-GCM-SIV Remember password: Password can be saved in ~/.config/OpaqueFiles/opaqueFiles.properties to avoid typing Compression: None, Zstd (default), gzip, XZ Reed–Solomon Error Correction Argon2id key derivation Verification: Checks your encrypted files for errors during encryption Checking: Check your encrypted files for malicious manipulation Scrubbing: Check your encrypted files for corruption, and fix the corruption UNIX Pipes Stress testing: Test CPU/Memory stabilty. Faster but not as reliable as Memtest

Description from Flathub — AppStream (Flathub)

Sources and checks

Facts collected from Flathub (credit card, source code, publisher, licence, free status, platforms, commercial use, version) — 10 November 2026
Last technical check: 8 November 2026
Description from Flathub — AppStream (Flathub)

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