jpgtostlFree, Private Image to STL Converter
Instantly convert JPG, PNG, and other supported images into 3D-printable STL reliefs. Everything runs locally in your browser, with live controls for depth, detail, and base thickness.
How to convert JPG to STL
Convert a JPG to STL in three browser-based steps. Each pixel's brightness becomes height — bright areas rise, dark areas stay low — forming a printable relief. You stay in control from the first upload to the final file, with no account or server queue between you and the result. The workflow is quick enough for testing several images and settings before printing.
Upload a JPG or PNG
Drop a JPG, PNG, or another supported image — a logo, photo, pattern or grayscale heightmap. Nothing is uploaded; it's read locally in your browser.
Tune it live
Adjust height, detail, base thickness and invert. Remove the background in one click. The 3D preview updates in real time.
Download STL
Export a print-ready binary STL (or OBJ) and send it straight to your slicer — solid, watertight and ready to print.
Why use our image to STL converter
Convert images into printable relief models with the speed, privacy, and control that a browser-based tool should provide. It is useful for physical keepsakes, tactile logos, and printable artwork without sending the source file to a third-party service.
Instant conversion
Convert your image to STL directly in the browser. There is no slow upload or server queue — the preview and mesh update as you adjust the settings.
100% private local processing
Your image stays on your device. The browser reads and processes it locally, so the source file is never sent to or stored on a server.
Truly free
No account, no credits, no paywall on the core tool. Because there's no server cost, there's nothing to charge for.
Full control
Height, resolution, base thickness, invert and auto background removal — the settings that matter for a clean relief.
Print-ready
Solid, watertight STL with a flat base and sealed walls — not a paper-thin surface your printer can't handle.
STL & OBJ
Download binary STL for 3D printing, or OBJ to open in Blender and other 3D editors. More formats coming.
JPG to STL printing tips
A good source image and a few practical settings make the converted model easier to print. Use these checks before downloading your JPG to STL file.
Choose a clear, high-contrast JPG
The converter uses pixel brightness as height. Logos, icons, maps, and grayscale photos with clear light and dark areas produce more readable reliefs than low-contrast or heavily compressed images.
Set the relief height for the print
Start with a moderate height, then use the live preview to check detail and edges. A thicker base improves handling, while a smaller height can preserve subtle photographic detail.
Use the base and wall settings
A flat base and sealed side walls turn the heightmap into a solid model rather than a thin surface. This helps the STL load correctly in a slicer and gives the finished print a stable footprint.
Check the preview before exporting
Rotate the model and inspect dark areas, background removal, and inversion. The browser preview updates immediately, so you can correct an image before downloading the final STL.
Open the STL in your slicer
After you convert JPG to STL, open the file in Cura, PrusaSlicer, OrcaSlicer, or another slicer to choose scale, orientation, filament, supports, and layer height for your printer.
Know what a relief can show
A JPG to STL conversion maps brightness to front-facing height, so it works best for logos, badges, coins, ornaments, terrain, and portrait reliefs. It does not create hidden sides or a complete 3D figurine from one flat image. For that reason, choose a subject that still makes sense as a raised surface.
JPG to STL converter FAQ
How does the JPG to STL converter work?
It reads the brightness of every pixel in your JPG or PNG and turns it into height: bright pixels become tall, dark pixels stay low. Those heights are stitched into a triangle mesh, sealed with a flat base and side walls, and exported as an STL — all in your browser. You can adjust the height, detail, base thickness, and inversion before exporting.
Is it really free?
Yes. The core image-to-STL tool is completely free with no account and no credits. Everything runs locally on your device, so there are no server costs to pass on to you. The live preview and STL download are included in the free converter.
Do you upload or store my image?
No. Your image never leaves your computer. It's decoded and processed in the browser with the Canvas API, and nothing is sent to or saved on any server. That also means your original JPG stays under your control while you experiment with settings.
What image formats can I use?
PNG, JPG/JPEG, WEBP, GIF and BMP. Grayscale heightmaps and high-contrast logos give the cleanest results. For a photo, choose an image with clear lighting and enough contrast so the relief has visible height changes.
Is the STL ready for 3D printing?
Yes. The model is solid and watertight — it has a flat base and closed side walls, so your slicer treats it as a printable object rather than a thin surface. Always check scale and orientation in your slicer before starting the print.
Can it turn a photo into a full 3D figurine?
No — and that's by design. This tool makes a relief (front-face height), not a full 3D object. For flat subjects like logos, coins and lithophanes that's exactly right, instant and free. Full 3D from a single photo needs AI, which we may add later.
Can I download the converted JPG to STL file?
Yes. After adjusting the relief, download a binary STL and open it in your slicer. You can also export OBJ when you want to continue editing in a 3D program.