The 7 Best Encryption Tools for 2025: Secure Your Files, Disks, and Cloud Data

VeraCrypt is the gold standard for disk encryption, and its open-source nature means the implementation is open to independent review. It supports AES, Serpent, and Twofish encryption algorithms individually or in cascading combinations. VeraCrypt can encrypt entire system drives, individual partitions, or create encrypted file containers that mount as virtual drives.

VeraCrypt builds on the legacy of TrueCrypt, with critical security improvements including significantly increased PBKDF2 iteration counts that make brute-force attacks dramatically more expensive. The ability to create hidden volumes provides plausible deniability. A hidden volume exists within the free space of a standard VeraCrypt volume and is indistinguishable from random data. If compelled to reveal a password, you provide the outer volume password; the existence of the hidden volume cannot be proven.

VeraCrypt is free, open-source, and available for Windows, macOS, and Linux. It is the first tool we recommend for anyone needing serious disk encryption, whether protecting a laptop from physical theft or securing backup drives stored offsite.

BitLocker is Microsoft's native full disk encryption solution, built into Windows 10 and 11 Pro, Enterprise, and Education editions. It encrypts entire volumes using AES encryption with 128-bit or 256-bit keys, integrating with the Trusted Platform Module chip on modern computers to verify boot integrity before decrypting the drive.

The TPM integration is BitLocker's strongest security feature. The encryption key is sealed to the TPM, which measures the system's boot state — BIOS/UEFI firmware, bootloader, and OS kernel — before releasing the key. If malware modifies any of these components, the TPM detects the change and refuses to unseal the key, preventing the system from booting unattended. This protects against offline attacks where an attacker removes the drive and attempts decryption on another machine.

BitLocker's main limitation is its closed-source nature and its availability only on Pro and higher Windows editions. Users of Windows Home cannot enable BitLocker, though Device Encryption (a simplified version) may be available on some hardware. There is no official cross-platform support — encrypted drives can only be read on Windows systems.

AxCrypt specializes in encrypting individual files rather than entire drives. Right-click any file in Windows Explorer or macOS Finder, select AxCrypt, and the file is encrypted with AES-256. Double-clicking an encrypted file prompts for the password before opening it in its native application. When the application closes, AxCrypt re-encrypts the file automatically.

This workflow suits users who need to protect specific sensitive documents — tax returns, contracts, medical records — without encrypting their entire system. AxCrypt also provides secure file sharing, allowing encrypted files to be shared with other AxCrypt users through password-protected key sharing. Cloud storage integration automatically encrypts files before they sync to Dropbox, Google Drive, or OneDrive.

The free tier supports basic AES-256 encryption and decryption on Windows and macOS. Premium at $3.75 per month (billed annually) adds mobile apps, cloud storage awareness, password management, and secure file deletion. AxCrypt Premium at $7.50 per month adds business features including team key sharing and master key management.

7-Zip is primarily known as a compression tool, but its encryption capabilities are robust enough to warrant inclusion in a security guide. When creating a 7z or ZIP archive, 7-Zip can encrypt file contents and filenames using AES-256 encryption. The encryption is implemented properly — it uses a key derivation function to convert the password into an encryption key rather than using the password directly.

The advantage of 7-Zip for encryption is ubiquity. The tool is installed on millions of computers, requires no special setup, and produces standard archive files that can be sent as email attachments or stored on cloud services. For sharing sensitive documents with people who may not have dedicated encryption software, a password-protected 7z file is often the most practical solution.

Limitations include the file-by-file workflow — encrypting many files requires creating individual archives or grouping them — and the absence of features like key management, secure sharing, or transparent encryption that dedicated tools provide. 7-Zip is free, open-source, and available for Windows, with unofficial ports for macOS and Linux.

GPG implements the OpenPGP standard, providing public-key cryptography for email encryption, file encryption, and digital signatures. Unlike symmetric encryption tools that use a single password for encryption and decryption, GPG uses key pairs — a public key that anyone can use to encrypt messages for you, and a private key that only you possess for decryption.

The public-key model solves the key distribution problem. You publish your public key on keyservers or your website. Anyone who wants to send you encrypted information uses your public key to encrypt it. Only your private key can decrypt the result. This enables secure communication without pre-sharing passwords. Digital signatures provide authentication and non-repudiation, proving that a message came from you and has not been altered.

GPG is free, open-source, and available for all major operating systems. GPG4Win provides a Windows installer with graphical tools. GPG Suite (GPGTools) provides macOS integration with Mail.app. Linux distributions include GPG by default. The command-line interface remains the most powerful way to use GPG, though graphical frontends like Kleopatra simplify common operations.

Cryptomator addresses a specific vulnerability in cloud storage workflows. When you store files in Dropbox, Google Drive, or OneDrive, the cloud provider holds the encryption keys and can access your data. Cryptomator encrypts files on your device before they sync to the cloud, ensuring the provider sees only encrypted blobs with randomized filenames.

The tool creates an encrypted vault within your cloud storage folder. When unlocked with your password, the vault appears as a virtual drive on your computer. Files added to this drive are automatically encrypted and synced to the cloud. The encryption is transparent — you work with files normally, and Cryptomator handles encryption in the background. Each file is encrypted individually with its own key, and directory structures are obfuscated.

Cryptomator is free and open-source for desktop (Windows, macOS, Linux). The mobile apps for iOS and Android cost a one-time fee of approximately $14 each, which funds ongoing development. The independent security audit by Cure53 in 2022 verified the encryption implementation. For users who rely on cloud storage but want to retain control over their encryption keys, Cryptomator is the best available solution.

FileVault is Apple's full disk encryption system, built into macOS and enabled with a single click in System Settings. It encrypts the entire startup disk using XTS-AES-128 encryption with a 256-bit key, protecting all data on the drive from unauthorized access when the computer is turned off or locked.

For Macs with Apple silicon (M1, M2, M3, M4) or T2 security chips, FileVault integrates with the Secure Enclave to manage encryption keys securely without user intervention. The recovery key generated during setup provides a backup access method if the user password is lost. Integration with iCloud allows the recovery key to be stored in the user's Apple ID account for retrieval from any device.

FileVault is free with macOS, requires no installation, and imposes negligible performance impact on modern Macs due to hardware-accelerated AES encryption in Apple silicon. The main limitation is its Apple-only ecosystem — FileVault-encrypted drives cannot be read on Windows or Linux systems without third-party tools. For Mac users who want seamless, integrated protection, FileVault is the obvious choice.