ImageToSTL.online is a free, browser-based image-to-STL converter that turns any PNG, JPG, WebP, SVG, GIF, or BMP into a watertight, printable 3D mesh in under a second. No uploads, no accounts, no watermarks—everything runs locally on your device using Canvas and WebGL. The tool offers four deterministic modes (photo relief, logo extrude, lithophane, keychain) and an optional AI Full 3D mode (paid) that reconstructs a full 360° colored mesh from a single photo.
What is ImageToSTL.online?
ImageToSTL.online is a free, private image-to-STL converter that runs entirely in the browser. It takes 2D images as input and outputs watertight binary STL files suitable for 3D printing. The tool is created by an independent team and processes all free modes locally—your images never leave your device. Output units are in millimeters.
Key Features
- 100% On-Device Processing — All free modes run entirely in your browser using Canvas and WebGL; no image is uploaded or stored.
- Four Free Conversion Modes — Photo Relief (brightness to heightmap), Logo Extrude (silhouette extrusion), Lithophane (thickness varies with brightness), and Keychain (extrude plus hole).
- Live 3D Preview — Rebuilds in under a second as you drag sliders, letting you inspect every angle before downloading.
- Watertight Binary STL — Every export is a closed, manifold mesh with a solid base that slices cleanly in Cura, PrusaSlicer, Bambu Studio, and Orca.
- Unlimited Free Conversions — No signup, no watermark, no file cap, no account required.
- AI Full 3D Mode — Optional paid mode that generates a full 360° colored mesh from a single product photo.
Who is it for?
- Hobbyist makers who want to quickly turn logos, photos, or QR codes into 3D-printable keychains, badges, or lithophanes without installing software.
- Gift makers looking to create personalized photo reliefs, pet portrait medallions, or lithophane night lights for family and friends.
- Event organizers needing custom desk signs, name badges, or branded merchandise in under a minute.
What can you do with ImageToSTL.online?
- Logo keychains — Drag a PNG with a transparent background, select Logo Extrude mode, add a hole, and download a ready-to-print keychain.
- Lithophane night lights — Use Lithophane mode on a family photo, print in white PLA at 100% infill standing vertically, then backlight for a glowing effect.
- QR code plaques — Convert a high-contrast QR code image into a scannable 3D plaque for menus, Wi-Fi cards, or booth signs.
- Photo relief wall art — Turn a portrait or landscape into an embossed panel where brightness maps to printable height.
How does it work?
- Drop or paste any supported image (PNG, JPG, WebP, SVG, GIF, BMP) onto the converter interface, or paste from clipboard with Ctrl+V. 2. Choose a mode from Photo Relief, Logo Extrude, Lithophane, Keychain, or AI Full 3D, then adjust sliders to fine-tune depth, thickness, or other parameters. 3. Preview instantly—the 3D model rebuilds every time you drag a slider. 4. Download the resulting watertight binary STL and open it in your slicer.
FAQ
Is this image to STL converter really free?
Yes. All four free modes are unlimited with no watermarks, no account, and no conversion limits. The AI Full 3D mode is paid and optional.
Do you upload or store my images?
No. For all free modes, your image never leaves your device. Processing happens locally using Canvas and WebGL. Only the optional AI Full 3D mode sends an image to a generation provider.
What image formats can I convert to STL?
PNG, JPG, WebP, SVG, GIF, and BMP are all supported. A PNG or SVG with a transparent background gives the cleanest result for logos and keychains.
Is the exported STL watertight and printable?
Yes. The generator builds a closed, manifold mesh with a solid base and exports binary STL. It slices cleanly in Cura, PrusaSlicer, Bambu Studio, and Orca.
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