If you've ever tried to turn a photo or logo into a 3D-printed bookmark, you know the old way: trace the image, clean up the vectors, import into your modeling software, extrude a base, position the design, export, go back and fix the alignment, export again, wonder why the slicer opened it at the wrong scale. It's a lot of steps for something that should be simple.

ButterySpace collapses that entire process into one step. You drop in an image and get a slicer ready bundle back. No modeling software, no manual alignment, no guesswork about geometry.

What the flow looks like

Head to ButterySpace → 3D Bookmark and upload your image. Line art with bold outlines converts best; PNG, JPG, and WebP all work. The tool isolates the subject, traces it into clean geometry, and builds the bookmark around it automatically.

Hit Make Bookmark, and in a few seconds you'll see "Your bookmark is ready." One download button. One ZIP. The result is a clean, two-sided bookmark shape: a 3MF project file and a single body STL for broad slicer support.

What's in the download

The ZIP contains exactly two files: the same bookmark geometry in two formats.

bookmark.3mf: the model in 3MF project format, readable by Bambu Studio, OrcaSlicer, PrusaSlicer, and Cura.
bookmark.stl: the same geometry as a single combined body, for broad slicer compatibility.

Both are in shared millimetre coordinates, a single combined object, so there's nothing to align in your slicer.

Open the 3MF in a slicer that supports 3MF, or the STL in any other slicer: Bambu Studio, OrcaSlicer, PrusaSlicer, Cura, or whatever you prefer.
It prints in one color by default. Want two colors? You paint them yourself in the slicer. See the Bambu Studio color guide.

There is no SVG inside the ZIP. The bundle is designed for slicers, not vector editors.

Colors aren't included. The files are geometry only. ButterySpace doesn't pre-assign or auto-load any colors. A multi-color bookmark is a one-minute job in your slicer's color tools, and we walk through it here.

Not sure what to do with the files once you have them? The bookmark ZIP quick-start guide walks through exactly which file to open in which slicer, what to do if the color doesn't appear, and how to check that the parts are aligned correctly.

Why one step matters

The manual route means owning and learning a modeling tool, then doing the same fiddly setup every time and exporting at the right scale for your slicer. None of it is hard once you've done it, but it's real overhead with real failure modes. ButterySpace skips that work entirely.

ButterySpace handles all of that silently. You get the outcome (a slicer ready bookmark) without needing to own or learn a modeling tool. The geometry is already dialed in.

What makes a good source image

The short version: line art converts best. A bold outline drawing, the kind you'd see in a coloring book, gives the tracer exactly what it wants: clean closed shapes with obvious edges. The outlines come through as crisp raised detail on the bookmark, and the enclosed regions are easy to paint one color each in your slicer. A black-and-white sword outline, a mascot drawn in thick marker, a tattoo-style design: that's the sweet spot.

Logos with strong silhouettes and high-contrast illustrations convert well too. Photos still work, but the result depends on how cleanly the subject can be isolated, so give them a plain background.

A few practical notes:

Bold, connected outlines read best. Thick, even line weight survives the print; hairline strokes can vanish at bookmark scale.
High contrast helps. Black lines on a white background are ideal. A photo of a pet on a plain background converts better than a photo taken in a cluttered room.
PNG with a transparent background is ideal if you have it, but a regular image is fine.
Keep the subject central. Heavy crops where the subject touches the edge can produce unexpected geometry.
Simple shapes read better as bookmarks. A bold outline or a clean silhouette will look sharp at bookmark scale; very fine detail may not survive the print.

The free tier and what it covers

ButterySpace is free to start. You get a small number of free generations per day, topped back up daily. Rewarded-ad refills and a Pro tier with no daily limit are coming soon.

Try it and see how your image converts. If anything looks off, try a slightly different crop or contrast level. The tool handles a wide range of source images well.

Ready to try it? Make a 3D bookmark from your image →