Code & Data
Encrypt HTML File Files Online
Web page markup language defining document structure.
Encrypt Your .html File Now
Free • No account • AES-256-GCM • Auto-deletes in 48h
Upload & Encrypt .html →Advertisement
How to encrypt a HTML File file
1.Click the upload button above and select your .html file. Files up to 500MB are supported.
2.FastDDL generates a random AES-256-GCM encryption key and encrypts your HTML File in your browser before upload. The server never sees the password.
3.You receive a shareable URL and a one-time decryption password. Send the link to your recipient through any channel.
4.The recipient enters the password on the download page to decrypt and download the HTML File file. The file auto-deletes after 48 hours.
Why encrypt HTML File files?
HTML File files are commonly used for web pages, email templates. When shared unencrypted, they can be intercepted, scanned, or accessed by anyone with the link — including the file sharing service itself.
FastDDL uses zero-knowledge AES-256-GCM encryption, meaning:
- Your html file is encrypted before it leaves your device
- The encryption password is never stored on the server
- Even FastDDL operators cannot decrypt your file
- The encrypted file is stored on Cloudflare R2 and auto-deletes
- Tampering is detected automatically via authenticated encryption
Zero-Knowledge
Server never holds your decryption key
AES-256-GCM
Military-grade authenticated encryption
Auto-Delete
Files vanish in 1h–48h, no trace