NC1 → STP · Windows

Convert NC1 to STP

NC1 to STP conversion without modelling software. reaConverter processes 3D files locally, so no extra licences are required.

NC1 to STP conversion is faster with the right tool. reaConverter handles everything from a few files to thousands in one batch. Processes files consistently every time, with full control over quality and output settings. Processes 3D files for collaboration across different platforms.

DownloadNC1 to STP ConverterConvert
NC1 to STP
Online
.nc1.STP
4.8

Converting files since 2001

Runs offline — nothing uploaded

Read what our users say →

How to Convert Multiple .nc1 Models to .stp?

1. Download and Install reaConverter

reaConverter installs quickly on any Windows PC. No dependencies, no bloatware — just a clean setup that's ready to use immediately.

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Install reaConverter

2. Load your NC1 files

Open reaConverter and import your .nc1 files. No file limits, no slowdowns. Add as many as you need.

Drag files into the window, use the Add Files button, or select entire folders.

Load your NC1 files into reaConverter

3. Select STP as output format

Select STP as target format and pick where to save results. You can keep default settings or fine-tune the output.

Select STP as output format

4. Start NC1 to STP conversion

Hit Convert to process your files. The log window shows progress, timing, and status for every file.

Start Conversion

Conversion complete? Your STP files are saved to the destination folder, ready to use.

Step by step

How It Works

reaConverter offers the fastest, simplest solution for converting your NC1 files into STP without 3D or CAD software - all models processed on your PC for maximum privacy and speed.

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3D Workflow

From mesh to CAD format

A CAD system or a supplier asks for STP, and the model exists only as NC1. reaConverter writes it to STP in batch, offline.

  • Get each model as one STP file that SolidWorks, Fusion or FreeCAD can open
  • Keep unreleased designs and client models on your PC: nothing is uploaded
  • Script the job from the command line for pipelines and scheduled runs
  • Convert a whole model library in one run with the same settings
Supported 3D formats
3D model conversion

User reviews

What people say after the first batch

Average User Rating:4.8
Last updated on September 28, 2026
reaConverter handles STP file conversion excellently. The batch processing feature is perfect for converting multiple CAD files at once, and the drag-and-drop interface makes it super easy to use. Quality is preserved well during conversion, and it supports plenty of output formats. Recommended for engineers and designers.
Michael Rodriguez
Michael Rodriguez
Mechanical Engineer
This software just works! My old laptop can’t handle Photoshop, but reaConverter flies through conversions without breaking a sweat. Wi-Fi gone? Still strong!
Robert Williams
Robert Williams
Happy User
Rare software that actually does it all! Converts anything, beautiful interface, and never lets me down. A must-have!
Henry R.
Henry R.
Happy User
For cross-platform compatibility, JPEG remains the gold standard. reaConverter’s precision conversions ensure perfect results every time, whether for presentations, websites, or client deliverables.
Paul Baker
Paul Baker
Happy User
Creating marketing materials for various platforms requires multiple file versions from single sources. reaConverter's workflow automation lets us generate PNG, JPEG, and SVG variants from AI and PSD files simultaneously. The color profile management ensures brand consistency across all outputs, and the processing speed allows for last-minute changes without delaying deadlines.
Rebecca Turner
Rebecca Turner
Marketing Agency CEO
I was drowning in mismatched file formats until I found reaConverter. The one-click conversion and editing tools simplified everything, and the pricing is reasonable for small businesses. Now I spend less time troubleshooting and more time growing my brand!
Emily K.
Emily K.
E-commerce Entrepreneur

FAQ

NC1 to STP Conversion

What are NC1 files?

DSTV NC1 is the most widely used CNC file format for structural steel fabrication, developed according to the standards of the German Steel Construction Association (DSTV). It contains detailed manufacturing data for steel components, including drilling, cutting, milling, marking, and part dimensions, allowing CAD/CAM systems to communicate directly with CNC machinery. The .nc1 extension is the standard file extension for DSTV NC files.

What are STP files?

STP is a file format used by popular CAD software. STP contains 3-dimensional data saved in the Standard for the Exchange of Product Data (STEP, ISO 10303) file format.

Can reaConverter convert NC1 to STP?

Yes! reaConverter instantly converts .nc1 to .stp with perfect quality preservation. With its batch processing feature, you can convert multiple files at once in just a few clicks. You can even convert NC1 models directly from Windows Explorer using the right-click menu — fast and convenient.

What is reaConverter used for?

reaConverter is a Windows converter for 800+ formats, 3D models among them. For NC1 to STP it replaces the round trip through Blender, a CAD program or an upload form: add the files, pick the output format, and the whole batch converts offline. Engineers, 3D printing shops and product teams use it to move models between CAD, printing, web and documentation formats.

Why choose offline conversion with reaConverter?

reaConverter is a software program that is used for offline files conversion. Your proprietary documents never leave your computer – essential for architects, engineers, healthcare and government contractors handling classified projects. Meets GDPR, HIPAA, CCPA, and corporate security policies by ensuring files never cross borders or third-party systems.

Can I convert NC1 to STP online?

If you only need to convert a few NC1 files to STP format, feel free to try our free online free online NC1 to STP converter — perfect for small batches with no installation needed!

How can I turn NC1 files into STP on my computer?

The best way to change NC1s to STPs on your PC is to install a quality piece of software, such as reaConverter. This software is extremely efficient in managing a wide range of batch files conversions, including conversion from NC1 to STP.

How can I automate NC1 to STP files conversion?

reaConverter supports all the most useful automation features such as right-click сonversion and Watch Folders for the most efficient automated files conversion in any software of this type.

Is there a way to convert NC1 files to STP using the command prompt?

reaConverter provides full access to all its features via Windows command line, including a high-performance command-line nc1 to stp converter for batch processing.

What else can I do with reaConverter?

Change format settingsCopy metadata (EXIF, IPTC)Convert DICOM filesCrop imageConvert RAW photos

Related conversions

Other ways to convert NC1 files, and other sources that convert to STP.

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Beyond format conversion

Batch conversion, editing, and processing across 800+ formats, from RAW and HEIC to DICOM, DWG, and PDF. Everything runs locally, with no cloud and no upload limits.

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