This screen transmits
Send a file or text
Any file up to 64 MB, or a pasted text snippet up to 4 MB. Compressed when it helps, restored with its original name.
Transfer files
with light.
Send a file or text from one screen to another device’s camera using animated QR codes.
- 01Open on both devicesLoad PhotonRelay once. It can then work offline.
- 02Send from one screenChoose a file or text. Leave the animated code visible.
- 03Receive inside PhotonRelayUse the Receive page, grant camera access, and point at the code.
This camera receives
Point and receive
Point your camera at the sender's screen to receive the file.
Channel simulation
Test recovery with frame loss
Run the Send and Receive encoder and decoder with simulated frame loss, duplicates and shuffled delivery. The seed makes each trial repeatable. Results measure software recovery, not camera throughput.
64 KiB payload · 512-byte blocks · 16-frame shuffle windows · bounded to 1,536 emitted frames.
Transfers are unencrypted. Any camera pointed at the sending screen can read the file.