Stamp Decoder

Stamp Decoder helps collectors scan and decode Datamatrix codes found on Modern GB stamps.

Use the camera to scan a stamp code instantly, or paste a code manually for quick lookup. The app turns the code into a clear, readable breakdown so you can identify the stamp and review its details without specialist tools.

Features:
• Scan modern GB stamp Data Matrix codes with your phone camera
• Decode pasted codes as well as scanned ones
• View a clear Summary screen for the key facts
• Open a Full Decode view for a field-by-field breakdown
• Built for collectors, researchers, and everyday reference use
• No account required

Privacy:
Stamp Decoder uses the camera only to scan stamp codes. Images and decoded codes stay on your device and are not uploaded for decoding.

Whether you are checking a single stamp or reviewing multiple finds, Stamp Decoder gives you a fast, simple way to understand modern GB stamp codes.

Recent changes:
• Improved stamp decoding and clearer collection results.
• The Collection now shows all known variants by default.
• Added safer collection backup and import.
• Improved subscription recognition and Restore Purchases.
• Updated the GB stamp catalogue and fixed checklist reliability issues.
• Added anonymous scan-success statistics to help improve the app; stamp images and barcode data remain on your device.