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Super3D Import & Export .Stp

by shouwang·Workflow

Images © shouwang. Used for product review; image policy.

Why we like it

A focused single-format add-on aimed squarely at the older .stp extension, for pipelines that pattern-match on the three-letter form rather than .step. It ships under GPL licensing and coexists with other Super3D format add-ons through separate extension IDs.

What is Super3D Import & Export .Stp?

The .stp format holds the same ISO 10303 STEP data as .step but uses the older three-letter extension. Some legacy CAD pipelines and operating systems still expect this exact filename pattern, and this add-on gives Blender dedicated import and export entries for it in the File menu.

Import works by picking a .stp file from File → Import → Super3D: STP (.stp); the add-on uploads it to the Super3D conversion service, then downloads the result and merges it into your active scene. On import, solids are tessellated to mesh and assembly hierarchy is preserved. Export runs through File → Export → Super3D: STP (.stp): the scene exports to OBJ on the main thread, OBJ is converted to .stp via Super3D, and the file is saved to disk with polygon mesh data written into it. Because conversion runs in the cloud, Blender stays lightweight and no local ISO 10303 STEP install is required.

Built for mechanical and engineering pipelines, the add-on is packaged under GPL licensing and tested on Blender 4.2 through 5.1.

Who is Super3D Import & Export .Stp best for?

Super3D Import & Export .Stp is best for mechanical and engineering pipelines that need the three-letter .stp extension — those stuck on .stp because scripts or tools pattern-match on it, archive recovery of old STEP exports saved as .stp, and vendor handoffs that must match a supplier's required extension.

How much does Super3D Import & Export .Stp cost?

Super3D Import & Export .Stp is completely free to download and use.

Key features

  • Dedicated Blender File menu entries for .stp import and export
  • Import path via File → Import → Super3D: STP (.stp): uploads to the Super3D service, then downloads and merges the result into the active scene
  • Export path via File → Export → Super3D: STP (.stp): scene exports to OBJ on the main thread, then OBJ is converted to .stp and saved to disk
  • On import, solids tessellated to mesh with assembly hierarchy preserved
  • On export, polygon mesh data written into the .stp file
  • Cloud-backed conversion through the Super3D service, so no local ISO 10303 STEP install is required — only Blender and an internet connection
  • Installs alongside other Super3D format add-ons, each a separate extension with its own ID and operator names

Tags

#stp#step#cad#import-export#iso-10303#blender-addon#cad-interoperability

Frequently asked questions

Which Blender versions does Super3D Import & Export .Stp support?

Super3D Import & Export .Stp is tested on Blender 4.2 through 5.1, so those releases are the safest bet for the import and export menu entries. The add-on's legacy bl_info entry covers Blender 4.0 and later, which points to broader coverage on older builds. If you run a version within the tested 4.2–5.1 range, you can expect the File menu import and export flows to behave as described on the developer's page.

Does Super3D Import & Export .Stp need ISO 10303 STEP installed?

Super3D Import & Export .Stp does not require ISO 10303 STEP to be installed on your machine. The conversion runs in the cloud through the Super3D service, so all you need is Blender and an internet connection. On import, the add-on uploads your .stp file to that service and downloads the result into your active scene; on export, it sends OBJ data out for conversion. Because the heavy lifting happens remotely, Blender stays lightweight.

What's the difference between .stp and .step in Super3D Import & Export .Stp?

Super3D Import & Export .Stp works with .stp, which holds the same ISO 10303 STEP data as .step but uses the older three-letter extension. That form predates Windows long-name support, and some legacy tools and operating systems still pattern-match on the exact filename. The conversion itself is identical either way, so you pick the extension your downstream tool insists on. Use this add-on when your pipeline expects .stp rather than .step.

Can Super3D Import & Export .Stp run alongside other Super3D format add-ons?

Super3D Import & Export .Stp installs alongside other Super3D format add-ons without conflicts. Each format ships as a separate extension with its own ID and operator names, so they coexist cleanly in the same Blender setup. That said, you only need this one if .stp actually shows up in your real workflows; if both .stp and .step appear, you can add both, otherwise pick the single extension that matches your pipeline.

Is Super3D Import & Export .Stp free?

Super3D Import & Export .Stp is listed as free in this catalog, so there's no cost to add it here. Licensing and any commercial terms can change, so check the developer's page on superhive for the current details before you rely on it in a production pipeline. The add-on is packaged under GPL licensing, which is worth reviewing if the terms matter for how you plan to distribute or use it.

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