Documents
Encrypt Comma-Separated Values Files Online
Tabular data stored as plain text with comma-separated fields.
Encrypt Your .csv File Now
Free • No account • AES-256-GCM • Auto-deletes in 48h
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How to encrypt a Comma-Separated Values file
1.Click the upload button above and select your .csv file. Files up to 500MB are supported.
2.FastDDL generates a random AES-256-GCM encryption key and encrypts your Comma-Separated Values 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 Comma-Separated Values file. The file auto-deletes after 48 hours.
Why encrypt Comma-Separated Values files?
Comma-Separated Values files are commonly used for data exports, spreadsheets, databases. 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 csv 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