Drag white bridges across black areas to support enclosed paper.
Building stencil…
Width180 mm
Bridges0
Paper islands0
ProcessingLocal threshold
Turn lettering or images into printable silhouettes, draw supporting bridges, and check for enclosed paper islands.
Step by step
01Choose the source
Choose lettering or load an image, then adjust the black threshold. Black represents the areas to cut away; white represents the paper to keep. Invert the image when the opposite silhouette produces a more practical stencil.
02Edit and inspect
Set the finished design width and the width of new bridges. Drag white bridges through the black cutout to connect enclosed white regions to the outer paper. Letters such as A, B, D, O, and P usually need support.
03Export and verify
Check the enclosed-region count and inspect thin areas at the intended size. Download SVG, PNG, or PDF and print at Actual size. Test on scrap material before cutting a reusable stencil.
Why this one
Ordinary thresholding
The stencil maker converts brightness into black and white using a selected threshold. It does not remove backgrounds semantically or call an image model. Simple, high-contrast artwork generally produces a cleaner result than a busy photograph.
Supporting paper islands
An enclosed white region becomes loose when the surrounding black material is cut away. The checker counts white pixel regions disconnected from the outer edge. A bridge restores a physical connection, but its width must also be strong enough for the material.
Honest vector export
The SVG represents horizontal runs of thresholded pixels as filled paths. It scales without embedding the original image, but it is not a smoothed contour or a finished laser toolpath. Use it for printing or refine it in a dedicated vector editor.
FAQ
In the stencil maker, draw a white bridge from the center of the O across the black letter to the surrounding white paper.
The stencil maker uses local brightness thresholding, pixel connectivity checks, and manual bridge editing. It does not use AI tokens or third-party APIs.
The stencil maker exports pixel-run filled paths, not smoothed laser toolpaths. Review and convert the geometry in suitable cutting software before machine use.
The stencil maker reports white regions that remain disconnected from the outer paper. A bridge may be too narrow or may stop before it reaches the surrounding white area.
The editor processes source files and project content in your browser. No AI service or third-party processing API is used. Shared links contain settings only; files and private content stay on your device unless you choose to download and share them.
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