Image to STL Converter is a free online tool that converts 2D images (PNG, JPG, WebP, SVG, GIF, BMP) into watertight binary STL files for 3D printing, all running entirely in the browser without any uploads.
What is Image to STL Converter?
It is a browser-based converter that takes common image formats and outputs STL meshes suitable for slicing in Bambu Studio, Cura, PrusaSlicer, and Orca. It offers four free modes: Photo Relief, Logo Extrude, Lithophane, and Keychain, plus a paid AI Full 3D mode. All processing uses Canvas and WebGL on-device; images never leave the device for free modes.
Key Features
- 100% on-device processing – No upload required; the image stays on your device, ensuring privacy.
- Live preview with sliders – Every adjustment updates the 3D preview in under a second.
- Watertight binary STL – Exports are closed, manifold meshes with real millimeter dimensions, ready for slicing.
- Unlimited free conversions – No account, no watermarks, no file caps across all free modes.
- Multiple conversion modes – Photo Relief (brightness to height), Logo Extrude (silhouette extrusion), Lithophane (thickness mapped to brightness), Keychain (extrude with hole), and AI Full 3D (paid, generates 360° model from one photo).
- Broad format support – Accepts PNG, JPG, WebP, SVG, GIF, and BMP, plus clipboard paste via Ctrl+V.
Who is it for?
- Makers and hobbyists – Create keychains, logo badges, and lithophane night lights without needing CAD knowledge.
- Gift makers – Turn family photos into lithophane panels or pet portrait medallions as personalized gifts.
- Small business owners – Produce custom QR code plaques, desk signs, and wedding monogram toppers for clients.
- Educators – Demonstrate 3D printing concepts by converting simple images into printable models.
What can you do with Image to STL Converter?
- Logo keychains – Extrude a logo, add a hole, print flat on the bed in under an hour.
- Lithophane night lights – Convert a family photo into a backlit panel using white PLA at 100% infill.
- QR code plaques – Make scannable menus or Wi-Fi cards from a high-contrast QR image.
- Desk signs & badges – Extruded name plates for events or reception desks.
How does Image to STL Converter work?
Three steps: 1) Drop or paste an image (PNG, JPG, WebP, etc.). 2) Choose a mode (Relief, Extrude, Lithophane, Keychain) and adjust settings via sliders. 3) Download the watertight STL and slice in your preferred 3D printing software.
FAQ
Is it really free?
Yes. All four modes (Photo Relief, Logo Extrude, Lithophane, Keychain) are free with no watermarks, no account, and no limits. The AI Full 3D mode is paid.
Does the tool upload my images?
No. For free modes, processing happens locally using Canvas and WebGL. The AI Full 3D mode sends the image to a generation provider.
What image formats are supported?
PNG, JPG, WebP, SVG, GIF, and BMP. PNG or SVG with transparent background gives best results for logos.
Is the STL watertight and printable?
Yes. The exported mesh is closed, manifold, with a solid base. It slices cleanly in Cura, PrusaSlicer, Bambu Studio, and Orca.
What is a lithophane?
A lithophane is a thin 3D printed panel where thickness varies with photo brightness. When backlit, the image appears. Print in white PLA at 100% infill, standing vertically.
