Move a file between two screens
No network, no cable, no account. One screen shows QR codes; the other reads them with its camera.
- Scan this with your phone's normal camera app.
- bizzle opens there, already linked to this screen.
- Tap Start camera on the phone, then press continue here.
One screen cannot show the pairing code and the data at once. After a few seconds this starts alternating between them, so the phone links up on its own — or press continue to go straight to sending.
Start something
Workspaces
The same link, set up for a particular job. Reachable any time from the menu.
Dead drop
Seal it with a passphrase first. The screen shows only ciphertext, so a camera in the room learns nothing.
Vault
One container, then a download, a block of text, or a reel of frames. Restore it back from any of them.
Share
Photos and notes to whoever is pointing a camera — one person or a whole room at once.
Air-gapped keys
Payment requests, and passing an unsigned transaction to a signer that has never touched a network.
Sound link
The same frames, carried by air instead of light. Two lanes of sixteen tones sounded together, one nibble in each — above almost anyone's hearing, and far above an aeroplane, which is enormously loud but almost entirely below 500 Hz. No network, no line of sight, nothing to pair: the other seat only has to be within earshot.
Off. Nothing is listening.
Sound carries to everyone in earshot, not to one seat — so treat it the way you would a room with other people in it. A dead drop sealed with a passphrase stays sealed whichever carrier moves it.
Dead drop
Sealed here, opened there. Everything the screen shows is ciphertext, so a camera in the room, a shoulder, or a photograph of the frames gives up nothing without the passphrase.
Nothing sealed yet.
Split a picture
The same passphrase above, made visible. One plane is the keystream it derives; the other is the picture with that keystream subtracted from it. Neither is anything on its own — and laid over each other they are not showing you the picture, they are computing it, because difference and exclusive‑or are the same operation at one bit per channel. Print the two on transparencies and it still works on paper.
Choose a picture and it becomes two planes of noise.
Nothing split yet.
Opened here
Sealed items that arrive will appear here.
Payment request
—
Air-gapped signing
Hand an unsigned transaction to a device that has never touched a network, and take the signed one back — over light, in both directions.
- Kind
- —
- Inputs
- —
- Outputs
- —
- Sending
- —
- Fee
- —
Send something
Drop a file here, paste, or .
Split into chunks and shown as QR codes. Nothing leaves this device.
This screen
- Frame
- hello
- Version
- —
- Payload
- —
- Rate
- —
This camera
Back up
Whatever you put in becomes one compressed container. That container is what you download, what you copy as text, and what the frames below encode — so nothing downstream has to care what the originals were.
- Files
- —
- Original
- —
- Container
- —
- Of original
- —
Choose files to build a container.
Restore from frames
Import the pictures back — exported frames, screenshots, or straight-on photographs of them. Order does not matter and neither does how many are missing, so long as enough remain. Rotated or angled photographs are not read.
Restore from text
Frame lab
Verification renders each frame to a canvas and reads it back out of the pixels — never from the arrays that drew it — then rebuilds the container and compares every byte.
Where this goes next
Every frame carries a fountain symbol, so frames are disposable: any sufficient subset rebuilds the file, whichever ones survive. That is what makes storing bytes as video plausible at all — —
Measured, not assumed: frames encoded with real ffmpeg at a fixed bitrate ceiling, decoded, and read back. 42 of 44 configurations rebuilt byte-identical — at 4K and 20 Mbps only 26 of 240 frames were still readable and the file came back anyway. Reed–Solomon repairs damage inside a frame; the fountain covers the frames lost entirely.
What is untested is the service, not the coding: these are the codecs and rates YouTube documents, not its own pipeline. Uploading bulk data to a video host is also squarely against its terms.
Messages
- TX frames
- 0
- RX frames
- 0
- Goodput
- —
- Chunk
- —
- Build
- —
A higher QR version packs more bytes into every frame but needs a sharper camera. If frames stop decoding, drop the version or raise error correction.