PUBLIC + PRIVATE / PLY1

One QR. Two layers.

Generate a readable public QR with an authenticated private payload. Recover both from an image or a module matrix.

Generate

AUTO · MINIMUM

Public data

Text mode supports Unicode text in any language, including emoji. Counts use UTF-8 bytes; the 2-byte QR encoding overhead is included in capacity.

Or load bytes

Private data

Text mode supports Unicode text in any language, including emoji. Counts use UTF-8 bytes.

Or load bytes

Auto · smallest QR that fits

QR version QR correction Mask

Private channel settings

Edits / QR block Noise reserve Private RS bytes

Set edits to 0 for padding only. Hybrid mode requires private RS and a noise reserve. Auto selects the smallest version for both payloads; correction and private-channel settings stay fixed.

Secret key · 32 bytes

Show key

Keep this key to recover the private bytes. Requests are processed by this Worker; payloads and keys are not stored by the application.

Calculating capacity...

Compare

Your QR pair will appear here

Both symbols use the same dimensions,
correction level and mask.

Verify & recover

GENERATED · IMAGE · CAMERA

Read the current QR directly, upload a file, or scan a code with your camera. Ordinary QR contents are decoded locally.

Camera

Allow camera access when prompted. No audio is requested. Camera frames stay in this browser; scanning stops after the first readable QR. A key is needed only for private recovery.

Upload a QR image or .matrix filePNG, JPEG, WebP, SVG or a canonical 0/1 matrix · up to 5 MB Module matrix Secret key optional · leave empty for public data only

Recovered bytes appear here after verification.