Mic Suspended Return to this tab to resume

Drop to Beam

Release to encrypt & chirp.

chirpfile

Tap to Listen

Enable mic to receive, or drop a file anywhere to send.

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Send files up to 1 GB
Batch transfer multiple files via auto-zip
Keep files available for 15 minutes
$0.99Day pass $4.99/moBest value

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Your iPhone and Windows laptop phone and work laptop Android and MacBook iPad and work desktop Chromebook and MacBook phone and client's laptop personal and locked device old phone and new phone Linux box and iPhone iPhone and Windows laptop are right next to each other.

There's no good way to share a file or clipboard between them. Every option requires the same network, an account, an app, or a cable.

What you've been doing instead
×AirDropApple to Apple only
×Nearby ShareAndroid/Chrome only
×Universal ClipboardApple to Apple only, tiny sizes
×Email to yourself25 MB limit, embarrassing
×iCloud / Google DriveUpload, wait, download, log in
×USB cableNeeds iTunes, who has the cable?
×Snapdrop / LocalSendSame WiFi required

Or just chirp it.

  1. Open this page on both devices. One listens, one transmits.
  2. Drop a file on the sender. It's encrypted in your browser before anything leaves it.
  3. The key chirps over sound to the receiver. It hears the chirp, downloads the encrypted blob, decrypts locally.

No one who wasn't in the room can decrypt it. The encrypted blob is burned after first download - or after 15 minutes, whichever comes first.

WiFi password, 2FA code, meeting PIN
Under 120 chars = pure sound. No server, no network at all.
Phone on LTE, laptop on corporate VPN
Different networks, different OS. Just two browser tabs.
Sensitive doc to the person across the table
Encrypted, chirped, deleted on receipt. No account, no trace.
Encryption
AES-128-GCM
Key delivery
Ultrasound
After download
Burned instantly
Install
No. Browser only.
chirpfile is currently a file-sharing tool, but the underlying primitive is broader: an encrypted payload delivered online, unlocked by a key that only travels through physical presence. If you have a use case for presence-locked transfer, in-room handoff, sensitive credential sharing, or anything else - tell us.
Solve for
Hotel & travel wifi Corporate laptop iPhone ↔ Windows Share a wifi password Send an API key No shared wifi LocalSend on different wifi PairDrop can't see device
Alternatives
AirDrop alternative LocalSend alternative Snapdrop alternative Nearby Share alternative
Learn
Security Compare Whitepaper Protocols playground FAQ How sound carries data Cross-network problem Zero-knowledge taxonomy
Mobile Demo
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