SecureMint

How to Encrypt Files for Free

SecureMint's file encryption tool processes everything in your browser. Your files are never uploaded to any server. Using military-grade AES-256-GCM encryption, you can protect any file with a password in seconds.

Encrypt a File Now
SecureMint uses zero-knowledge design. The server cannot read your data.

Steps

1

Open the encryption tool

Navigate to SecureMint's file encryption page. No registration or login required.

2

Select your file

Drag and drop or click to select any file. There is no file size limit for local encryption.

3

Set a strong password

Choose a strong password. The encryption uses PBKDF2-SHA256 with 600,000 iterations to derive the key, following OWASP 2024 recommendations.

4

Download the encrypted file

The file is encrypted with AES-256-GCM right in your browser and downloaded as a .enc file. You can also choose self-decrypt HTML format.

Why It's Secure

  • AES-256-GCM provides authenticated encryption — any tampering is detected during decryption.
  • PBKDF2-SHA256 with 600,000 iterations protects against dictionary and brute-force attacks on the password.
  • Zero server communication: the file never leaves your browser. Verify in the Network tab.
  • Open-source implementation you can audit.

FAQ

What happens if I forget the password?
The file cannot be recovered. This is by design — zero-knowledge encryption means nobody, including us, can decrypt without the password.
What is AES-256-GCM?
AES-256-GCM is a symmetric encryption algorithm that provides both confidentiality and integrity. The '256' refers to the key size in bits, and 'GCM' (Galois/Counter Mode) ensures the data hasn't been tampered with.

Related Tools

Secure File Sharing→Self-Decrypt HTML→Password Generator→

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