Convert STL to 3MF — Free
Upload your STL file and get a 3MF in seconds. No account, no watermark.
How to convert STL to 3MF
Convert your STL files to 3MF format quickly and easily with BoltConverter. This free online tool helps you prepare your 3D models for printing or sharing without needing complex software.
Our service processes your files securely on our servers. Your uploaded STL and converted 3MF files are automatically deleted immediately after conversion, ensuring your privacy.
Upload Your STL File
Click the "Choose File" button to select the STL model you want to convert from your device.
Start the Conversion
After selecting your file, click the "Convert" button to begin the STL to 3MF conversion process.
Wait for Processing
BoltConverter will process your file on our secure servers, which usually takes only a few moments.
Download Your 3MF File
Once the conversion is complete, click the "Download" button to save your new 3MF file.
Frequently asked questions
Is BoltConverter's STL to 3MF converter free to use?
Yes, BoltConverter offers this STL to 3MF conversion tool completely free of charge for all users.
How long does BoltConverter store my uploaded files?
Your uploaded STL files and the converted 3MF files are automatically deleted from our servers immediately after the conversion is finished.
Is there a file size limit for STL conversions?
Yes, the current maximum file size for converting STL to 3MF with BoltConverter is 100 MB.
What is the quality of the converted 3MF file?
BoltConverter aims to maintain the original quality of your 3D model during the conversion from STL to 3MF.
Can I convert multiple STL files at once?
Currently, BoltConverter supports converting one STL file to 3MF at a time. Please convert files individually.