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Encrypt Files Online - Free AES-256 File Encryption | HostConverter

🔒 Online Secure File Encryption

AES-256 Client-side Encryption • Your files never leave your browser

Password-protect documents, photos, and archives with AES-256-GCM. Nothing is uploaded — encryption happens 100% client-side using the Web Crypto API.

Securely use online encryption and description service anytime, anywhere and any device

Drag & Drop File Here

or

Password Strength
Encryption Completed

Your encrypted file is ready.

Download Encrypted File
Download Original File
✔ 100% Browser Processing
✔ Zero File Upload
✔ AES-256 Encryption
✔ Authenticated encryption with a random IV per file — industry standard cryptography.
✔ Your file and password stay in your browser. We have zero knowledge of either so its safe for your file and document

Frequently Asked Questions

Everything you need to know about HostConverter's browser-based file encryption.

No. Your files are never uploaded to our servers. Encryption and decryption happen entirely inside your browser using the Web Crypto API.

No. Your password never leaves your browser. It is never stored, transmitted, or logged by HostConverter.

HostConverter uses AES-256-GCM encryption with PBKDF2 (SHA-256) key derivation, a random salt, and a unique initialization vector (IV) for every encrypted file.

Yes. Your files are encrypted on your device before they could ever be sent anywhere. The encryption process happens locally inside your browser.

You can encrypt almost any file including PDFs, Word documents, Excel files, PowerPoint presentations, images, videos, audio files, ZIP archives, source code, and many other formats.

HostConverter does not impose a fixed file size limit. The maximum supported size depends on your browser, available memory, and your device.

No. The encryption and decryption tools are completely free to use without registration or sign-in.

Your password cannot be recovered. Because HostConverter never stores your password, your encrypted file cannot be decrypted without the correct password.

Yes. Simply open HostConverter on another compatible browser, choose your .hcenc file, enter the correct password, and decrypt it.

Every encryption uses a new random salt and IV. This means encrypting the same file twice with the same password will produce different encrypted files, improving security.

A .hcenc file is HostConverter's encrypted file format. It securely stores your encrypted data together with the information required to restore the original file during decryption.

HostConverter works with modern versions of Google Chrome, Microsoft Edge, Mozilla Firefox, Safari, Brave, and Opera that support the Web Crypto API.

No. Without the correct password, the encrypted file cannot be decrypted. Choose a strong, unique password and keep it secure.

No. HostConverter does not store your original files, encrypted files, or passwords. Everything stays on your device.

HostConverter offers browser-based AES-256 encryption, zero file uploads, no registration, complete privacy, and fast client-side processing. Your files remain under your control at all times.