Coaster Generator
Pick a round, square or hexagon coaster, set the size and the lip, and put text, your own logo, a honeycomb or rings on top, raised or engraved. You download a watertight STL, a 2-color 3MF or a ZIP of STLs. It is free, unlimited and runs in your browser.
How to make a 3D printed coaster
- 1
Pick the coaster
Choose round, square or hexagon and set the size, the base thickness and the lip that keeps drips on the coaster. Set the lip height to 0 for a flat coaster.
- 2
Add a design
Type one or two lines of text, upload a logo or a line drawing, or pick a honeycomb or rings pattern. Plain gives a coaster with no design.
- 3
Raised or engraved
Raised designs stand on the top face. Engraved designs are cut into it, which keeps the top flat for a glass. Set the height or depth and, if you like, pockets underneath for rubber pads.
- 4
Download
Press Download STL for one part, or download the 3MF to print the design in a second colour on a multi-material printer.
Coaster generator settings
What each setting does and the range it accepts.
| Shape | Round, square or hexagon. Square and hexagon coasters take a corner radius of 0 to 40 mm. |
|---|---|
| Size | 50 to 200 mm. Round coasters are measured across, hexagons across the flat sides, squares along a side. |
| Base and lip | Base 2 to 10 mm thick. Lip 0 to 8 mm tall and 1 to 15 mm wide, around the edge of the top face. |
| Design | Text (up to 2 lines of 24 characters), an uploaded PNG, JPG or WebP image traced to outlines, a honeycomb pattern, rings, or plain. |
| Raised or engraved | Raised designs are 0.4 to 4 mm tall on the top face. Engraved designs are 0.4 to 4 mm deep, and the 3MF has an inlay part that fills them in a second colour. |
| Pad pockets | Four round pockets, 10 mm wide and 1.2 mm deep, under the coaster for stick-on rubber or felt pads. |
| Output | Binary STL in millimetres with the coaster as one closed part. 3MF with the coaster and the design as separate coloured parts. ZIP with one STL per part. |
Raised or engraved design?
A raised design is the easy way to get two colours: print the coaster in one colour and change filament at the top of the base, so the design comes out in the second colour. The colour change height is shown under the settings.
An engraved design keeps the top flat, so a glass sits level and the coaster is easy to wipe. Print it in one colour, or open the 3MF on a multi-material printer to fill the engraving with a second colour.
Using your own logo or drawing
Upload a logo, an icon or a line drawing on a plain background. The dark parts become the design; turn on Invert for a light logo on a dark background, and move the threshold slider until the preview shows the shape you want.
The image is traced in your browser and never uploaded. Simple shapes with thick lines print best; photos with soft shading do not trace into clean outlines.
Printing tips
Print the coaster flat with the bottom on the bed. The lip and the design go straight up, so no supports are needed. A 0.2 mm layer height works well.
PLA and PETG both work for coasters. PETG copes better with a hot mug. A coaster is not watertight like a cup, so wipe spills off rather than leaving water standing on it.
Thin strokes need room for the nozzle. With a 0.4 mm nozzle, keep letters at 5 mm or taller and pattern lines at 0.8 mm or wider.
Want to print something else?
Turn a photo or a short text prompt into a 3D model with AI, or make a nameplate or a keychain with the free generators.