By Team Hypomnema · Updated October 19, 2026
Make numbered outline puzzles from a clear silhouette, with a solution sheet.
Start with a good source
Use a dark subject against a plain light background, or try the sample.
Design and review
Adjust silhouette threshold and dot count. Review the completed outline as well as the puzzle.
Print or export
Print both sheets or download dot coordinates as CSV.
Privacy and practical limits
Everything is generated on your device; photos, names and designs are not uploaded. No AI model or cloud processing is used. JPG, PNG and WebP: up to 20 MB and 16 MP per photo, 50 MB combined, four photos for a book and one for other tools. Photos are normalized to a 640-pixel working copy; complex textures and low contrast may need different settings. SVG and PNG export the selected sheet; PDF includes every sheet, including separate solutions. PDF artwork is rasterized at approximately 200 dpi on A4. SVG contains vector shapes/text and embedded pixels for photo puzzles; original metadata is not retained. Smaller inputs may be needed on mobile. Cancel stops the active worker; changing controls discards stale results. The largest dark connected region supplies the outer contour. This is silhouette thresholding, not object recognition; dark backgrounds can produce a rectangular outline. Dot labels can become crowded at high difficulty. The completed outline is included separately.
Try the workflow
Keep your original documents and review the output. You can also browse all guides or contact Team Hypomnema.