Format conversion
STEP to STL — convert in your browser, free daily allowance
Turn STEP files into STL without installing desktop software. Open the converter, drop your file, set the output options and download the result. Single files need no account.
Two-step conversion
source -> target
Step 1 — Source
STEP
Drop or select a file: step, stp. The converter reads the content on your device.
Accepted input: step, stp
Step 2 — Target
STL
Set the output options, run the conversion and download the STL file.
- Units
- Millimeters, centimeters or inches
- Orientation
- Y-up or Z-up
- Quality
- Mesh deviation and angular tolerance
The options above are the ones this converter exposes. Defaults are safe for most files; change them when your downstream tool expects specific units or orientation.
What this conversion does
Input
STEP
STEP is a precise, vendor-neutral 3D CAD exchange format. It carries exact B-Rep surfaces and solids.
Output
STL
STL stores a surface as a triangle mesh with no color or material data. It is the most widely accepted 3D printing format.
Use this converter when you have a STEP file and the next step needs STL, for example 3D printing and slicer software. The conversion is handled by a dedicated tool, so you do not have to install a desktop application to move a single file.
Limitations
- Conversions run in the browser and share the memory your device gives the page. Very large files are better handled on a desktop or with a cloud task.
- The output is a tessellated triangle mesh. Exact B-Rep surfaces, solids and feature history are not preserved.
Frequently asked questions
Is STEP to STL free?
Yes. This pair links to a converter that runs in your browser, and single-file conversions use a free daily allowance. No account is required to start, and you can register later for a larger allowance.
Do my files leave my device?
This pair links to a local browser converter, so the file is processed on your device and is not uploaded. Cloud processing, where a tool uses it, is labeled on the tool page and stores results only temporarily.
Can I convert several files at once?
Single-file conversion is available to everyone. Batch conversion is a paid capability, and cloud tasks have their own daily or monthly quotas. The pricing page lists the current limits.
What should I check after converting to STL?
Open it in your slicer and confirm the scale and orientation before printing.