STEP
converter.

Open and convert STEP files (.step / .stp) in your browser. Nothing to install, no account.

5 conversions a day free, including 2 to solid formats like STEP.

No account needed

In your browserYour file never leaves this device. Meshes in any direction, STEP and BREP to mesh, and STL to STEP with real surfaces. Free, no limit.On our serversEvery format: STEP with real surfaces, SolidWorks, Parasolid, IGES, repair. Deleted within 24 h without an account.

Drop a STEP file.step / .stp · up to 200 MB

On our servers. No account: deleted within 24 hours. Signed in: kept until you delete them. Never shared or used for training.

Convert to13 formats

Every conversion listed here completes.

Convert to	What you get
STEP to 3DM	Exact	.3dm
STEP to 3MF	Tessellated	.3mf
STEP to BREP	Exact	.brep
STEP to Collada	Tessellated	.dae
STEP to GLB	Tessellated	.glb
STEP to glTF	Tessellated	.gltf
STEP to IGES	Exact	.iges
STEP to OBJ	Tessellated	.obj
STEP to OFF	Tessellated	.off
STEP to Parasolid	True surfaces	.x_t
STEP to PLY	Tessellated	.ply
STEP to SLDPRT	True surfaces	.sldprt
STEP to STL	Tessellated	.stl

Convert from14 formats

3DM to STEP
3MF to STEP
BREP to STEP
Collada to STEP
GLB to STEP
glTF to STEP
IGES to STEP
OBJ to STEP
OFF to STEP
Parasolid to STEP
PLY to STEP
SLDASM to STEP
SLDPRT to STEP
STL to STEP

AlsoOther ways in

About.step / .stp

STEP (ISO 10303) is the closest thing engineering has to a universal solid format. It stores exact B-rep geometry — a hole is a cylindrical face, not a ring of facets. Fusion 360, Inventor, Onshape, SOLIDWORKS, Creo, NX, CATIA and FreeCAD all read it; .step and .stp are the same format. AP242 supersedes AP203 and AP214.

What you send when the other side has to keep modelling, quote machining, or open the shape in a different CAD system.

Questions4 answered

How do I open a STEP file?

Drop it on this page. It opens in the browser with nothing installed, and converts to any format below.

Is it free?

Yes — 5 conversions a day with no account, 2 of them to solid formats like STEP. A free account raises both, to 4 solid conversions a day, and adds 25 credits.

Do you keep my STEP files?

Without an account, the upload and the result are deleted within 24 hours. With an account, both stay in your files until you delete them; deleted files leave our servers within 24 hours.

What can a STEP file be converted to?

Every format listed on this page — each one is a conversion that completes.

See every conversion MeshWeave does.