HashDrop never stores your files. The signaling server only brokers the initial connection and steps away before any data moves. Once the WebRTC tunnel is open, your files travel exclusively between the two devices.
How transfer works
HashDrop splits each file into 16 KB binary chunks and streams them over an encrypted WebRTC data channel (DTLS/SRTP). When all chunks arrive, the receiver reassembles them and verifies the result against a SHA-256 hash computed on the sender’s side. If the hashes match, the file downloads automatically.Transfer status lifecycle
The UI reflects the following states as a transfer progresses:| Status | Meaning |
|---|---|
idle | No file selected, waiting for user action |
generating | Creating the secure warp code via Web Crypto API |
ready | Code generated, waiting for a receiver to connect |
connecting | WebRTC handshake in progress |
connected | Peer connection established |
transferring | Chunks streaming to the receiver |
completed | All chunks received and SHA-256 verified |
failed | Connection or integrity check failed |
Sender workflow
- Sender
- Receiver
Open the transfer page
Navigate to File Transfer from the home screen. Enter a username when prompted — it will be shown to the receiver on the incoming request screen.
Select your files
Click Choose files or drag and drop one or more files onto the drop zone. HashDrop supports any file type up to 10 GB per file. You can select multiple files at once.
Get your warp code
HashDrop generates a cryptographically secure
ADJECTIVE-NOUN code (e.g., COSMIC-FALCON) using the Web Crypto API. Share this code — or the auto-generated QR — with your receiver. The code expires in 5 minutes.Wait for connection
The status moves from
ready → connecting → connected as the receiver enters the code and the WebRTC handshake completes.Transfer starts automatically
Once connected, HashDrop begins streaming 16 KB chunks immediately. A live transfer speed indicator shows the current throughput in MB/s.
Text and link sharing
If you only need to send a URL or a short text snippet rather than a file, switch to Text / Link mode on the transfer page. The same warp code flow applies — the receiver gets the text delivered directly over the data channel and can copy it instantly.Multiple files
When you select more than one file, HashDrop automatically packages them into a single ZIP archive (hashdrop-<timestamp>.zip) using DEFLATE compression before transfer. The receiver downloads one ZIP containing all your files.