STP → ICO · Windows

Convert STP to ICO

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

Online converters too slow for your STP files? reaConverter works locally and handles unlimited batches. All processing runs locally on your PC, so your files stay private and secure. Manufacturing teams use it to share models across departments.

DownloadSTP to ICO ConverterConvert
STP to ICO
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.stp.ICO
4.8

Converting files since 2001

Runs offline — nothing uploaded

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How to Convert Multiple .stp Models to .ico?

1. Download and Install reaConverter

First, grab reaConverter from the download button below. Installation is fast, and the software runs offline — no account or signup needed.

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Install reaConverter

2. Load your STP files

Add STP files to reaConverter. One file or a thousand, the process is the same. Everything runs locally on your machine.

You can drag-and-drop files, browse to a folder, or add entire directory trees including subfolders.

Load your STP files into reaConverter

3. Select ICO as output format

Select ICO from the output format list and set your destination folder. You can also adjust quality and compression settings.

Select ICO as output format

4. Start STP to ICO conversion

Click the Convert button to start. reaConverter will process all your files with the settings you selected.

Start Conversion

When finished, your new .ico files will be waiting in the destination folder.

Step by step

How It Works

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

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Technical note

Before you convert STP to ICO

A 3D model has no front of its own, so the ICO shows it from one viewpoint: the angles you set on the X, Y and Z axes, or a preset such as the isometric view. Whatever faces away from that viewpoint is not in the picture, so a part with features on several sides needs several images, which the multiple-frames option renders in one run. Without further settings, a STEP assembly converts to a single ICO. With Load STEP as separated shapes switched on, each part becomes its own file instead, so one assembly fills a folder with one ICO per part.

3D Workflow

From 3D model to picture

Turn STP models into ICO previews without opening a 3D program. Set the angle once, and every model in the folder is rendered the same way.

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
The step-by-step video makes conversion foolproof. I'd recommend this to my grandma - it's that well-explained!
DeShawn M. Thompson
DeShawn M. Thompson
Happy User
I'm really impressed with this software - it converts files between formats incredibly fast!
Lin Zhang
Lin Zhang
Happy User
I firmly believe working with JPEG — the universal format supported by all devices and apps—is the wisest choice. reaConverter handles these conversions flawlessly.
Ava Thomas
Ava Thomas
Happy User
An efficient all-in-one solution for image conversion and light editing, designed for maximum user-friendliness.
Elena Anderson
Elena Anderson
Happy User
Enable shell integration for lightning-fast file conversions directly from Windows Explorer.
R. Lewis
R. Lewis
Happy User

FAQ

STP to ICO Conversion

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.

What are ICO files?

ICO files contain the images used as icons for files, folders or programs on the Microsoft Windows platform. The icons appear on the desktop, in Windows Explorer or in the Start Menu and help identify each item. ICO images are generally of a small size, are scalable, and they can also serve as website logos or symbols that appear in the web browser next to the URL. The equivalent of ICO files on Mac computers is called ICNS.

Can reaConverter convert STP to ICO?

Yes! reaConverter instantly converts .stp to .ico 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 STP 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 STP to ICO 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 STP to ICO online?

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

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

The best way to change STPs to ICOs 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 STP to ICO.

How can I automate STP to ICO 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 STP files to ICO using the command prompt?

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

What else can I do with reaConverter?

Separate STEP PartsConvert CAD formatsSet file dateConvert microscopy filesChange picture sizeConvert RAW formats

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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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