Convert STEP → STL Online — Free
Tessellate STEP/STP CAD files to STL mesh for 3D printing.
Drag & drop or click to browse
Accepts .step files up to 100 MB
Free plan includes 0 conversions/day. Need more? Talk to us →
What is a .step file?
STEP is a widely-used format in the CAD category. Tessellate STEP/STP CAD files to STL mesh for 3D printing. Files in this format are commonly used across various tools, pipelines, and workflows.
What is a .stl file?
STL is a popular format in the CAD ecosystem. Converting from STEP to STL gives you access to its unique features, broader tooling support, and improved interoperability.
How to convert STEP → STL online
Upload your file
Drag & drop your .STEP file onto the upload zone, or click "Browse" to select it.
Validate & preview
The tool checks the file type and size before uploading. Invalid files are rejected immediately with a clear error.
Convert on the server
Click "Convert" to upload and process your file. Server-side conversion typically takes ~30 seconds.
Download your result
When done, click "Download .STL" to save your converted file. Files are securely deleted after 1 hour.
Frequently asked questions
Is this STEP to STL converter free?
Yes. The STEP → STL tool is free for up to 0 conversions per day. Pro (0/day) and Business (unlimited) plans unlock higher limits.
Is my file secure on the server?
Your file is uploaded over an encrypted HTTPS connection to a secure server worker. The converted file is stored temporarily and automatically deleted after 1 hour. We never share or store your files longer than necessary.
What is the maximum file size for STEP?
You can convert files up to 100 MB. If your file is larger, consider compressing it first or upgrading to a Business plan for increased limits.
What is the difference between STEP and STL?
STEP and STL are both formats in the CAD category, each with different use cases, tooling support, and feature sets. Tessellate STEP/STP CAD files to STL mesh for 3D printing.
Can I convert multiple files at once?
Batch conversion is available on Pro and Business plans. Free users convert one file at a time.