Top 10 Best Cross Platform Encryption Software of 2026

VeraCrypt is a free, open-source disk encryption software forked from TrueCrypt, designed to create virtual encrypted disks within files or on entire partitions/drives. It supports cross-platform use on Windows, macOS, and Linux, providing on-the-fly encryption/decryption with algorithms like AES, Serpent, and Twofish, often cascaded for enhanced security. Advanced features include hidden volumes for plausible deniability, keyfiles, and PIM (Personal Iterations Multiplier) for key derivation strengthening, making it a gold standard for secure data protection.

Cryptomator is an open-source client-side encryption tool that lets users create encrypted vaults for files stored in any cloud service like Dropbox, Google Drive, or OneDrive. It mounts these vaults as virtual drives, providing transparent encryption and decryption so files appear unencrypted locally while remaining secure in the cloud. Supporting Windows, macOS, Linux, iOS, and Android, it ensures zero-knowledge privacy with strong AES-256 encryption and scrypt key derivation.

GnuPG (GNU Privacy Guard) is a free, open-source implementation of the OpenPGP standard, enabling users to encrypt, decrypt, sign, and verify data and communications securely. It supports key generation, management, and exchange, making it ideal for securing emails, files, and messages across platforms like Linux, Windows, macOS, and others. As a command-line tool with optional graphical frontends, it provides robust cryptographic capabilities trusted by governments, organizations, and privacy advocates worldwide.

7-Zip is a free, open-source file archiver that supports creating encrypted archives using AES-256 encryption for secure storage and transfer of files. It excels in high compression ratios across multiple formats like 7z, ZIP, and RAR, while providing cross-platform compatibility through native Windows support and ports like p7zip for Linux and macOS. As an encryption solution, it protects archive contents with password-based encryption, making it suitable for compressing and securing sensitive data.

AxCrypt is a cross-platform file encryption software that secures individual files and folders using AES-256 encryption, with support for Windows, macOS, Linux, Android, and iOS. It offers seamless right-click encryption/decryption directly in file explorers, secure sharing links, and integration with cloud storage services like Dropbox and Google Drive. The tool also includes a password manager and secure delete features in its premium version, making it suitable for personal and professional file protection.

Boxcryptor is a cross-platform client-side encryption tool that secures files stored in popular cloud services like Dropbox, Google Drive, OneDrive, and more by encrypting them transparently on your device before upload. It supports Windows, macOS, Linux, iOS, and Android, providing zero-knowledge encryption with AES-256 standards. The software integrates seamlessly into your cloud workflow, allowing secure sharing and collaboration without changing storage providers.

NordLocker is a cross-platform file encryption tool developed by the makers of NordVPN, enabling users to create secure 'lockers' for protecting sensitive files and folders with AES-256 encryption and zero-knowledge architecture. It supports drag-and-drop encryption, secure sharing with passwords or links, and optional cloud syncing across Windows, macOS, Linux, iOS, and Android. While primarily focused on personal vaults rather than full-disk encryption, it prioritizes ease of use for everyday secure storage needs.

PeaZip is a free, open-source file archiver and encryption tool that allows users to create and manage compressed, encrypted archives using strong ciphers like AES-256, Twofish, and Serpent. It supports a wide range of archive formats including ZIP, 7Z, and RAR, with features for password protection, keyfiles, and two-factor authentication via authenc. Available as a portable app for Windows and Linux, it emphasizes security and privacy without telemetry.

Duplicati is a free, open-source backup software that creates secure, encrypted, incremental backups of files and folders to local storage or numerous cloud providers like Google Drive, OneDrive, and Dropbox. It operates cross-platform on Windows, macOS, and Linux, employing AES-256 encryption performed client-side for zero-knowledge privacy. The tool supports deduplication and compression to optimize storage and bandwidth usage.

Rclone is a free, open-source command-line tool that excels in syncing files to over 40 cloud storage providers with built-in client-side encryption via its 'crypt' remote feature. It encrypts both file contents and filenames using strong ciphers like AES-256-GCM before upload, ensuring data privacy across Windows, macOS, Linux, and more. While powerful for secure cloud backups, it's primarily a sync utility with encryption rather than a standalone disk encryption solution.