Free tools for your 3D print files.
View, fix, split, convert or create. Right here in your browser.
- Nothing uploaded
- No sign-up
- Works offline
Drop a file here
or paste it, or pick it from your device
STL · 3MF · STEP · OBJ · GLB · SVG · G-code · photos
What do you want to do?
View
Open any 3D printing file, check sizes, see every layer.
- G-code viewerSee exactly what your printer will do: every layer, line and travel move, with print time and filament.
- 3MF viewerOpen any 3MF and see every object and plate in 3D, with colours and sizes in mm.
- STL viewerOpen any STL in 3D, measure it in mm, and see its volume, filament weight and whether it's watertight.
Convert
Move files between slicers, CAD and Blender, at the right size.
- 3MF to STLTurn any 3MF, Bambu Studio and PrusaSlicer projects too, into STL files: merged or one per object.
- STEP to STLTurn a STEP file from CAD into a printable STL, with control over mesh quality.
- STL to 3MFCombine one or more STL files into a single 3MF with correct mm units, ready for your slicer.
Fix
Too big, broken, too heavy or the wrong size: sorted before you slice.
- Split STLCut a model that's too big for your bed into parts that fit, with pin holes so they line up when you glue them.
- Repair STLFix holes, flipped faces and loose triangles so your model slices cleanly. See exactly what was fixed.
- Reduce STLCut the triangle count of a heavy STL, OBJ or 3MF and see exactly how much the shape changes.
Make
Start from a photo, a name, a link or a place on the map.
- Lithophane makerTurn a photo into a lithophane you can print, flat or curved, with a live 3D preview.
- Text to STLType a name or a word and get a printable name tag, keychain, sign or stencil, in one or two colours.
- QR code to STLTurn a link or your Wi-Fi details into a printable QR code sign, coaster or tag, in one or two colours.
File won’t behave?
All guidesYour files never leave your computer.
How we knowQuestions
Are my files uploaded anywhere?
No. Every tool runs inside your browser, so your 3D files, drawings and photos are read and converted on your own device. Nothing is sent to a server, which makes it safe for client CAD files and paid models. (Map to STL is the one tool that downloads map data, and only after you ask it to.)
Is it really free?
Yes. There is no sign-up, no watermark and no file size limit beyond what your device's memory can handle.
Which file types can I open?
3MF (including Bambu Studio and PrusaSlicer projects), STEP and STP, STL, OBJ, GLB and glTF, SVG, G-code (also Prusa .bgcode and Bambu .gcode.3mf), and JPG, PNG or WebP photos for the lithophane maker. Results download as STL, 3MF, OBJ or STEP.
Will the files work in my slicer?
Yes. STL, 3MF and OBJ open in Bambu Studio, PrusaSlicer, OrcaSlicer and UltiMaker Cura. Sizes are kept in millimetres, and 3MF downloads keep separate parts and colours where the tool supports them.
Does it work on a phone or a Mac?
Yes. It runs in any modern browser on Windows, macOS, Linux, Android and iPhone. Very large CAD assemblies are faster on a computer.