Frequently Asked Questions
Everything you need to know about using Wormhole for secure file sharing.
Yes! Wormhole is completely free for everyone. Share files up to 10GB without any cost. There are no hidden fees, no premium tiers, and no ads.
No account is required. Just drop your files, get a link, and share. We believe privacy means not collecting unnecessary personal information.
You can share files up to 10GB. Since files transfer directly between browsers via P2P, there's no upload wait time — streaming begins immediately.
It depends! With "Direct P2P" mode, yes — your browser needs to stay open. But with "Send & Close Browser" mode, you can close your browser immediately. We store your encrypted file temporarily (we can't read it without your key) so recipients can download anytime.
Absolutely! Wormhole uses WebRTC and WebTorrent — the same technology that powers video calls in your browser. You're sharing your own files directly with recipients. This is completely legal worldwide.
No. Files are encrypted in your browser using AES-256-GCM before any transfer. Even with "Send & Close" mode, we only store encrypted bytes — without the key (which stays in your URL fragment and never reaches our servers), the data is unreadable gibberish. We literally cannot decrypt your files.
When a link expires (based on time or download count), everything is deleted — metadata and any encrypted files stored via "Send & Close" mode. The link simply stops working and the encrypted data is permanently removed.
Yes! You can set the download limit when creating the link (1, 5, 10, 25, or 100 downloads). Multiple recipients can download simultaneously as long as you keep your browser open.
Yes, Wormhole works on modern mobile browsers (Chrome, Safari, Firefox). However, for the best experience with large files, we recommend using a desktop browser.
Transfer speeds depend on your internet connection and the recipient's connection. Since it's peer-to-peer, transfers on the same local network can be extremely fast. For remote transfers, it's typically limited by the slower of the two connections.
Any file type! Documents, images, videos, archives, applications — you name it. We don't restrict file types. The encryption is applied at the byte level, so any file works.
With peer-to-peer connections, IP addresses are exchanged between peers for the WebRTC connection. If this is a concern, both parties can use a VPN. Our servers only see encrypted metadata.