Priya Sharma
just what i needed.
STL to OBJ Converter: Free & Online
Convert 3D models from .STL to .OBJ file format and prepare for printing in one app.
- Free
- No sign-up
- No install
Open .stl → Export → choose .obj
Click Open Files and pick your .stl file. Then click Export, choose .obj in the Extension list and click Save.
How to convert STL to OBJ
Open your .stl file
Click Open Files in the converter above and pick the file on your computer. It opens in your browser, with no sign-up.
Export as .obj
Click Export and choose .obj in the Extension list. The list starts at .mrmesh, the native MeshInspector format.
Save the file
Click Save. The .obj file downloads to your computer.
In the desktop app
- Install and sign in. Download MeshInspector for Windows, macOS or Linux and sign in. The free Community plan is enough.
- Open the file. Click Open Files and pick the .stl file.
- Export. Select the model, click Export and choose .obj.
- Save. Pick a folder and save the .obj file.
What to know about STL → OBJ
- STL and OBJ both store a triangle mesh, and neither stores units, so the numbers of the model stay as they are.
- OBJ lists each vertex once and refers to it from the faces; STL repeats the corners of every triangle.
- STL has no colors or textures, so the OBJ carries geometry only, with no material (.mtl) file needed.
- OBJ is a plain-text format that 3D modelling and rendering software widely reads, which makes it a common exchange format.
- If the STL has holes or flipped triangles, fix them before export: Fill Holes and Flip Normals are free tools.
Online or desktop
Online
The converter on this page runs the MeshInspector web app in your browser: no install, no sign-up. It suits single files; the web app works within your browser's memory.
Desktop
The desktop app runs on Windows, macOS (Apple silicon) and Linux. Use it for large files, many files, and the tools the web app does not have. The free Community plan covers opening and exporting; see Pricing for what the paid plans add.
FAQ
Do I need an account to convert STL to OBJ?
No. The converter on this page is the MeshInspector web app running in your browser without sign-up. Click Open Files and pick your .stl file, select it in the scene list, click Export, choose .obj in the Extension list and click Save. The converted file downloads to your computer.
Is the STL to OBJ converter free?
Yes. Opening a .stl file and exporting it as .obj use free tools, here, in the web app and in the desktop app on the free Community plan. Paid plans add tools such as Mesh Healer and automatic repair; the Pricing page lists what each plan includes.
Are colors and units kept?
OBJ stores no units, so check the size of the model after conversion. Colors and textures in OBJ live in a separate .mtl file and image files; the exported OBJ carries the mesh geometry, so check the result in your target app if you rely on materials or textures.
Is there a file size limit?
There is no fixed limit on this page, but the web app works within your browser's memory: up to about 4 GB, or 16 GB in browsers with 64-bit WebAssembly. For very large models, or many files, use the desktop app for Windows, macOS or Linux.
Free Community planWindows, macOS (Apple silicon) and Linux
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By Mesh Inspector TeamPublished: Updated:
