Zero-knowledge · Single-use · Self-destructing
Secure file sharing.
Downloaded once, then gone.
Encrypt a file in your browser. Get a single-use download link. Share it. After the recipient downloads it, the file is permanently destroyed on our end.
5 free credits on registration. Vault uploads start at 2 credits.
Why cloud storage isn't secure file sharing
When you share a file via Google Drive, Dropbox, or WeTransfer, you're granting persistent access to a plaintext copy stored on someone else's servers. The link stays alive until you manually revoke it. The service can read the file. And "sharing" means both parties have indefinite access.
Provider access
Google, Dropbox, and WeTransfer store your files in plaintext and can read them. Court orders, rogue employees, and breaches all expose your data.
Persistent links
A shared link stays active until manually revoked. Forwarded links, browser history, and link preview bots create additional exposure.
No destruction proof
When you 'delete' a shared file, no recipient-side guarantee exists. Cached copies, email previews, and download history may persist.
How VoidNote Vault works
- 1
Select your file
Any file type, any size within your plan. PDFs, certificates, private keys, archives, images, binaries — the vault is format-agnostic.
- 2
Encrypted in your browser before upload
AES-256-GCM encryption runs locally. The decryption key is generated in your browser and embedded in the download link — it never leaves your device and never reaches our server. We receive only ciphertext.
- 3
Share the single-use download link
Send the link via email, Slack, or any channel. The link is safe to transmit — it references an encrypted blob. The decryption key rides in the URL fragment and is never logged.
- 4
File destroyed after first download
The recipient's browser downloads the encrypted file, decrypts it locally, and the server immediately deletes the ciphertext from storage. The link is dead. Nothing remains on our infrastructure.
What people share securely
Private keys & certificates
SSL certificates, SSH keys, GPG keys, code-signing certificates — deliver once to the recipient's machine, then destroy.
Legal documents
Contracts, NDAs, salary offers, settlement documents. Share with one party, single download, no persistent cloud copy.
Database exports
Production data dumps for debugging, migration, or handoff. Single-use download — no copy lingers on a file host.
Financial records
Bank statements, tax documents, invoices with sensitive details. One recipient, one download, then gone.
Medical records
Lab results, prescriptions, imaging files. Zero-knowledge means the platform cannot read what you share.
Source code snapshots
Proprietary code for a contractor review. They download it once; there's no persistent access to revoke or forget to revoke.
Compared to other file sharing tools
| Service | Client-side encryption | Single-use link | Auto-destroyed |
|---|---|---|---|
| Google Drive | No | No | No |
| Dropbox | No | No | No |
| WeTransfer | No | No | After 7 days |
| OneDrive | No | No | No |
| Firefox Send (defunct) | Yes | Optional | Yes |
| VoidNote Vault | Yes — AES-256-GCM | Yes | On download |
Firefox Send was discontinued in 2020. VoidNote Vault is the closest maintained equivalent — with zero-knowledge encryption and a broader platform (notes, streams, CLI, SDK).
Common questions
What's the maximum file size?
File size limits depend on your plan. Credit-based accounts support files up to a few hundred MB. Pro subscribers get 50 GB vault transfer per month, Unlimited subscribers get 500 GB. Each file upload costs 2–30 credits depending on size.
Can I share with multiple recipients?
The standard Vault link is single-use — first download consumes it. For multiple recipients, you'll need to create a separate vault link for each person. This gives you per-recipient control and ensures each person genuinely gets the file first-hand.
What if the download fails partway through?
If a download is interrupted before the file is fully transferred, the server treats it as an incomplete download and the link remains valid. The record is only deleted on a successful complete download.
Is this GDPR compliant for sharing personal data?
VoidNote is operated by Quantum Encoding Europe Limited, registered in Ireland (EU). Zero-knowledge encryption means we never process the content of uploaded files — only encrypted bytes. The file is destroyed after download. There is no persistent storage of personal data beyond the encrypted ciphertext during the transfer window.
Share a file that disappears after download
Register for 5 free credits. Vault uploads start at 2 credits. No plaintext ever stored.