CONVERTCRAFT V3.0: THE NEXT GENERATION

Premium. Private. Pure Performance.

Experience Sub-2s processing speeds with our brand-new V3.0 engine. We've rebuilt everything to give you a Prime Experience where your files never leave your device.

WHY WE ARE DIFFERENT:

  • WASM Powered: Every conversion runs locally on your hardware.
  • Absolute Privacy: Your files are yours. No cloud, no tracking, no compromises.
  • Built for You: We've scaled this platform entirely out-of-pocket for a global creator community.

KEEP THE MISSION ALIVE: 🛡️

Running this infrastructure at this scale costs serious money. We don't sell your data, and we don't run annoying ads. We rely solely on users like you.

If ConvertCraft saved you time or kept your data safe today, help us keep it free and private for everyone.

[ SPEED: INSTANT ][ SWITCH: <100ms ][ LOAD: <2 SEC ]PRIVACY: 100%All systems OK

❤️ Support Our Mission / Donate

💎 Support the Mission ($4.99/mo)☕ One-time Donation

Every dollar keeps another 1,000 users private.

How to Encrypt Files Online for Free

Encrypt any file with AES-256 directly in your browser. No upload, no account — your files never leave your device.

File encryption is essential for protecting sensitive documents before storing them in the cloud, sending them via email, or sharing on USB drives. AES-256 encryption is the gold standard used by governments and enterprises worldwide.

ConvertCraft's File Encrypt tool uses the Web Crypto API to perform AES-256-GCM encryption entirely in your browser. Your original file and encryption key never leave your device.

To encrypt a file: open the File Encrypt tool, drop your file, enter a strong password, and click Encrypt. The tool generates an encrypted file that can only be decrypted with the same password.

The encrypted output includes integrity verification — if anyone tampers with the encrypted file, decryption will fail and alert you. This provides both confidentiality and tamper detection.

To decrypt, use the same tool: drop the encrypted file, enter your password, and click Decrypt. The original file is restored exactly as it was before encryption.

Open File Encrypt →

Frequently Asked Questions

How secure is AES-256 encryption?

AES-256 is used by the U.S. government for top-secret information. With a strong password, it is effectively unbreakable with current technology.

What happens if I forget my password?

There is no recovery mechanism. If you lose the password, the encrypted file cannot be decrypted. Always store your passwords securely.

Can I encrypt multiple files at once?

Currently, the tool encrypts one file at a time. To encrypt multiple files, create a ZIP archive first and then encrypt the ZIP file.