Program gate
Valid dimensions, clues, at least one filled cell, exact hash, solution count, and a reproducible difficulty estimate.
Private by default · no account
Nonogram Studio
Draw a pixel picture or import a photo on this device. Studio builds the clues, checks whether they describe exactly one solution, estimates difficulty, and keeps drafts locally until you export or submit a review packet.
Draw your picture
The imported image is processed in your browser and is never uploaded.
Two-stage publishing contract
Blind editorial review
Logic quality and picture quality are scored separately. Reviewers receive the packet without personal identifiers.
Rights and version record
Public publication remains closed until the creator supplies ownership, license and appeal information.