Free 3D printing tools

14 tools that run in your browser. Pick by what you want to make, or by what you have to start with. Nothing is uploaded, there is no account, and every tool is free.

From a photo or picture

LithophanePhotos into night lights, lamps, boxes, ornaments, colour, layered and animated lithophanes.Start with: a photoOpen →Filament paintingA photo as a full-colour relief on a single-nozzle printer, with the filament swaps worked out.Start with: a photoOpen →Flip signA ridged sign that shows one picture from the left and another from the right.Start with: two pictures or wordsOpen →Shadow sculptureA sculpture that casts two or three different shadows, from pictures or words.Start with: pictures or wordsOpen →

Make and cast

Mold makerSilicone shell, two-part and open molds from any model; repairs the mesh and fills undercuts.Start with: a modelOpen →Vase & planter NEWVases and planters from a profile, with twist, ribs and waves — for vase mode or with walls and a drain.Start with: nothingOpen →Cookie cutter NEWCookie cutters and stamps from shapes, letters or a drawing.Start with: a shape, text or drawingOpen →

Signs, gifts and puzzles

Sign & keychain NEWMulti-colour signs, name plates, keychains and scannable 3D QR codes.Start with: text, an image or a linkOpen →Puzzle maker NEWA photo as a printable jigsaw puzzle in one print, or a model cut into interlocking pieces.Start with: a photo or a modelOpen →

Print something big

SplitterCut a model that is too big for your printer into pieces with pegs, dovetails or magnets, sized to your printer.Start with: an STL, 3MF or OBJOpen →

Organise

Gridfinity NEWGridfinity bins and baseplates sized to your drawer, with a planner for the whole drawer.Start with: your drawer sizeOpen →

Laser and CNC

Engraver NEWPhotos, text and cut-outs to G-code, sent to a GRBL laser or CNC over USB or Wi-Fi.Start with: a laser or CNCOpen →

Fix and calculate

Repair & convert NEWFix holes, flipped faces and overlaps, simplify, and convert between STL, OBJ, 3MF, PLY and GLB.Start with: a modelOpen →Calculators NEWPrint cost, selling price, filament left on a spool, shrinkage, flow and e-steps.Start with: nothingOpen →

No tool matches that yet. Tell me what you wanted to make — new tools come from requests.

How-to guides

How to make a lithophane — photo, thickness, print settings and light
How to make a silicone mold from a 3D print — box, two-part and shell molds
Gridfinity guide — dimensions, magnets and planning a drawer
How much does a 3D print cost? — the formulas and a worked example
Flow rate and e-steps calibration — Marlin, Klipper, OrcaSlicer, Bambu Studio
How to fix an STL file — holes, non-manifold edges, converting
How to print bigger than your build plate — split, connect, assemble
All guides →

Questions

Are these tools free?

Yes. Every tool is free with no account, no download limit and no watermark, and you may sell what you make. The site is kept up by Amazon affiliate links for things the tools call for.

Are my files uploaded?

No. Every tool runs in your browser with JavaScript and WebAssembly; photos and models stay on your computer. The only network traffic is loading the page and its libraries.

Do they remember my settings?

No. Each tool starts from its own defaults every time you open it, so an old test value never carries over into a new project.

Which printers do they work with?

Any. The tools write STL (and 3MF where colours or plates matter) for any slicer — Bambu Studio, OrcaSlicer, PrusaSlicer, Cura and the rest. The engraver writes G-code for GRBL lasers and CNCs.