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Secure File Sharing is Hypastack’s zero-knowledge pipeline for sending files privately. It’s the right choice for anything sensitive: documents, private media, backups.

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Uploading

Drag a file into the dashboard, or use the Developer API if you’re building this into your own app. The file is encrypted in your browser before it’s sent, see How Encryption Works for the details.

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Expiration and burn-on-read

Every file has a lifetime after which it deletes itself automatically. You can also mark a file burn on read, which deletes it shortly after its first download, useful for one-time secrets.
How long a link can live for depends on your plan. Paid plans get a longer expiration window (a multiplier on the base window). See Pricing & Plans.
The share link contains the decryption key in its URL fragment (#...). Send the whole link to whoever needs the file. Because the fragment never reaches Hypastack’s servers, the file is only ever readable by someone holding the complete link.
If you lose the link, the file cannot be recovered by Hypastack. There is no password reset for a URL fragment.

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Deleting a file early

You can delete a file from your dashboard at any time before it expires. Deletion is immediate and irreversible, Hypastack does not keep soft deletes or hidden backups of file content. On paid plans, you can set a custom slug for the share link instead of a generated one. See Pricing & Plans for which tiers include this.