Secure large-file transfer

Send 50 GB of confidential work without handing it to a transfer service.

The file is encrypted on your machine, the link expires within 24 hours, and the decryption key travels in the URL fragment — which browsers never send to a server.

The recipient opens it. We never could.

For post-production studios, photographers, architects, law firms and consultants delivering heavy, sensitive files.

Built for confidentiality

Chunked, resumable uploads

Multi-gigabyte files upload in encrypted chunks and resume after a dropped connection or a locked phone.

Key in the URL fragment

The fragment after # is never transmitted to our servers, so the link we store cannot decrypt the payload.

24-hour maximum lifetime

Every public link expires within 24 hours, enforced by the database and a destruction job — not by UI politeness.

Optional passphrase

Add an Argon2id passphrase on top so even the link alone is not enough.

Encrypted previews

Recipients preview images, video and documents in the browser, decrypted locally, without installing anything.

Delivery you can prove

Access events are logged so you know when a delivery was opened, without logging the content.

What a transfer service normally sees

Classic transfer tools receive your file as plaintext, keep it readable on their infrastructure for days, and resolve download links server-side. That is fine for a press kit and inappropriate for an unreleased campaign, a case file or a client's raw footage.

How DRIVUNO delivers instead

The browser encrypts the file locally, uploads ciphertext, and produces a link whose secret part stays client-side. Our servers can prove a blob exists and enforce its expiry; they cannot open it. Behind the transfer you also keep a permanent encrypted vault, so delivery and archive are the same system.

Built for repeat delivery

Turn a client folder into a recurring encrypted delivery: Live Clone mirrors it continuously, versions are retained, and each hand-off is a fresh expiring link instead of a permanent public URL.

Frequently asked questions

Can DRIVUNO read our messages or files?

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No. Messages and files are encrypted on the device before they are sent. DRIVUNO Rooms seals every message with XChaCha20-Poly1305 under a room key that is itself wrapped per member with X25519. Servers relay and store ciphertext only.

How is this different from Slack or Microsoft Teams?

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Slack and Teams encrypt data in transit and at rest, but the provider holds the keys, so administrators, automated systems and legal requests can reach message content. DRIVUNO is designed so that this is technically impossible on our side: we never hold a key that opens your content.

How large can a transfer be?

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Transfers are bounded by your plan storage rather than a per-file cap; uploads are chunked and resumable, so multi-gigabyte deliveries are routine.

Does the recipient need an account?

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No. A public encrypted share opens in any modern browser and decrypts locally with the key contained in the link fragment.

Can I revoke a link before it expires?

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Yes. Links can be destroyed immediately, and every link expires within 24 hours regardless.

Related

Your sensitive files deserve more than a traditional cloud.

Start free with 1 GB. Zero-knowledge encryption from the first upload — no admin override, no AI scanning, no plaintext on the server.

1 GBfree vault
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