Convert Parasolid
to 3MF.

Updated 2026-10-06

To convert Parasolid to 3MF, drop the .x_t or .x_b file into the converter below and download the .3mf, ready for Bambu Studio, PrusaSlicer, Cura or Windows. The exact surfaces are triangulated to within 0.02 mm and the unit is recorded in the file, so the part arrives at the right size. 5 conversions a day are free with no account.

5 conversions a day with no account. No card, no install.

No account needed
Drop a Parasolid file.x_t / .x_b · 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.

ResultTessellated

Edges are sampled first, so chamfers, fillets and holes come through crisp. Default tolerance: 0.02 mm chord deviation, 0.1 rad angle — fine enough to print directly.

Tessellation is one-way — keep the Parasolid file if you will edit the shape later.

ChangesParasolid → 3MF

What changes between Parasolid and 3MF

A Parasolid file holds an exact solid; 3MF holds a triangle mesh, in a package designed to replace STL for 3D printing. So every curved face becomes facets, close enough to the true surface (0.02 mm) that a printer cannot tell the difference, while edges are sampled first so holes and chamfers keep their crisp outlines.

What 3MF adds over STL is bookkeeping a printer needs. It records its unit, so a 20 mm part cannot open as 20 inches or as 0.8 mm, and it is compressed, so the file is smaller than the equivalent STL.

What is lost is the exact geometry: a hole's radius is now approximated by facets, and nothing in the 3MF can be edited the way the solid could. There was no feature history in the transmit file to lose. Keep the .x_t or .x_b for any later change.

HowThree steps
  1. Drop your .x_t file above — up to 200 MB without an account.
  2. 3MF is already selected as the output.
  3. Download the .3mf. Without an account, files are deleted within 24 hours; signed in, they are kept until you delete them.
FormatsWhat you are holding

Parasolid transmit file (.x_t / .x_b)

Parasolid is the modelling kernel under SOLIDWORKS, Solid Edge and NX, and a transmit file is its exact solid geometry. Between systems that share the kernel it often survives better than a neutral format. .x_t is text, .x_b is binary; both hold the same solid.

Someone in a Siemens or SOLIDWORKS shop sent you an .x_t and nothing you have opens it.

3D Manufacturing Format file (.3mf)

3MF was designed to replace STL for 3D printing. It records units, colour and material, keeps multiple objects separate, and is compressed. Bambu Studio, PrusaSlicer, Cura and Windows all read it. The shape is still a triangle mesh.

You are printing and want units, colour and part structure to survive the handover.

Questions10 answered
Can Bambu Studio or PrusaSlicer open an .x_t?
No. Both read STL, 3MF, OBJ and STEP, but not Parasolid. Convert to 3MF here, or to STEP if you would rather let the slicer triangulate it.
Is 3MF better than STL?
For printing, usually: it records units and is smaller. Use STL when a print service or an older tool asks for it.
How do I convert x_b to 3MF?
Drop the .x_b on this page. Binary and text Parasolid files convert the same way.
What if the Parasolid file will not convert?
A few surface types, variable-radius blends among them, are not rebuilt yet. When the converter meets one it stops and names it rather than writing a damaged file, and the attempt does not count against your free conversions. Ask the sender for a STEP export instead; every Parasolid-based system writes one.
Is the Parasolid to 3MF converter free?
Yes. 5 conversions a day with no account and no card. A free account raises the limit and adds 25 credits.
How accurate is the 3MF mesh?
The exact surfaces are triangulated into a 3MF mesh. Edges are sampled first, so chamfers, fillets and holes come through crisp. Default tolerance: 0.02 mm chord deviation, 0.1 rad angle — fine enough to print directly. Tessellation is one-way — keep the Parasolid file if you will edit the shape later.
Does it read both .x_t and .x_b?
Yes. Text (.x_t) and binary (.x_b) hold the same solid, and both convert here.
How big a file can I convert?
To a mesh format like STL: 300 MB with a free account, 200 MB without one. To STEP, Parasolid or SLDPRT: 140 MB, because rebuilding a solid takes about twice the memory of writing a mesh. Maker and Studio convert up to 830 MB and 380 MB — a large conversion on a paid plan gets the server to itself.
Is it safe to upload my Parasolid file?
Files travel encrypted and are processed by machine on our own servers — no third parties, no ads or trackers, no AI training.
Is my Parasolid file deleted after converting?
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.
Beyond convertingSame file, four workspaces

Keep the part open: fill it with a lattice, check it with FEA, texture a surface, or slice it into cut-ready sheets. These workspaces are in early access — create an account, then apply from inside the app.

Create free account See pricing

AlsoOther ways in
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Going the other way? Convert 3MF to Parasolid.

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