SCREEN → CAMERA
Move files with light.
Choose what to send
The receiver can copy the text or save it as a .txt file.
Set the pace
If progress stalls, lower the speed or move the camera closer.
Your file becomes a signal.
Choose a file, then point the receiving
camera at the code that appears here.
Repair frames fill missing pieces. The receiver keeps what it already has.
Point your camera
Keep the entire QR code in view. Beam collects the pieces in any order.
The SHA-256 checksum matches.
You can pause the camera and resume. Keep this tab open to retain your progress.
Catch the signal.
Start your camera, then aim it
at the sender’s screen.
A download becomes available only after the complete file passes verification.
How to get a reliable transfer
1. Open Beam on both devices. Choose Send for a document, any file, or pasted text. Choose Receive on the device with the camera. Use HTTPS or localhost for camera access.
2. Start the camera, then the signal. Keep the code large, square to the camera, and free of glare. For more speed, select two codes and fullscreen, then keep both codes in view. Use one code or a lower speed if the camera struggles.
3. Wait for “File verified”. The sender repeats until you pause it. A one-way visual link cannot tell the sender when the receiver has finished.
Verified text can be copied or saved as a .txt file. Best for small documents. Optical speed depends on your camera, screen, and lighting. Refreshing this page clears transfer progress. Anyone who can see the codes can read the file.