GRD → STP · Windows

Convert GRD to STP

Batch convert GRD to STP on an ordinary Windows PC. No GIS licence, no command line, the same settings applied to every file.

Online converters too slow for your GRD files? reaConverter works locally and handles unlimited batches. All processing runs locally on your PC, so your files stay private and secure. Handles whole folders of tiles and layers in one run, with identical settings on every file.

DownloadGRD to STP ConverterConvert
GRD to STP
Online
.grd.STP
4.8

Converting files since 2001

Runs offline — nothing uploaded

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How to Convert Multiple .grd Files to .stp?

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 GRD files

Open reaConverter and add your GRD files. You can load individual files, entire folders, or even nested subfolders.

Drop your GRD files into the window or use File menu to browse and select folders.

Load your GRD files into reaConverter

3. Select STP as output format

Select STP from 800+ supported output formats. Choose your destination folder and adjust settings to match your needs.

Select STP as output format

4. Start GRD to STP conversion

Hit Convert and let reaConverter do the work. The progress window shows status for each file in real time.

Start Conversion

After conversion, find your STP files in the output folder. Click 'Show converted files' to open it directly.

Step by step

How It Works

reaConverter offers the fastest, simplest solution for converting your GRD files into STP without GIS software - all files processed on your PC for maximum privacy and speed.

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Technical note

How GRD and STP differ in practice

GRD is made of pixels and STP is a geometry format, so the two describe shape in fundamentally different ways. Check the result before sending it downstream: what matters is whether the output contains usable geometry or a picture placed inside an STP container.

Map Data Workflow

Turn GIS data into something anyone can open

Not everyone who needs to see GRD data has GIS software. reaConverter renders it to STP for a report, an email or a slide, and handles a whole folder in one run.

  • Render every file in a folder to STP with the same size and settings
  • Set DPI and output dimensions before the run, not afterwards
  • Pick up new data automatically with Watch Folders, or script the job from the command line

Everything runs on your PC, which matters for cadastral, utility and client data that should not pass through an upload form.

GIS data conversion

User reviews

What people say after the first batch

Average User Rating:4.8
Last updated on September 13, 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
An excellent program! I use it regularly in my work - it supports nearly every file format imaginable. The interface is intuitive and runs flawlessly every time.
Roger Cook
Roger Cook
Happy User
For agencies handling confidential data, reaConverter eliminates cloud-upload risks while delivering unmatched conversion reliability. Our team uses it both in-office and remotely with identical results.
Jamal Bailey
Jamal Bailey
Satisfied Customer
Our volunteer team uses reaConverter to prepare images for fundraising campaigns. The learning curve was minimal, and the results are professional-grade. The customer support team even helped us customize a workflow — fantastic service!
Jason P. Bailey
Jason P. Bailey
Non-Profit Coordinator
We deployed reaConverter across our department to standardize file formats for our archives. The command-line support and automation features integrated perfectly into our systems. Stellar performance and zero crashes—it just works.
David R.
David R.
IT Solutions Architect
So simple! I just needed to convert a couple of files to another format, and for such a straightforward task, the online converter worked perfectly — delivering the files I needed in no time. Excellent service!
Kenneth D. Carter
Kenneth D. Carter
Satisfied Customer

FAQ

GRD to STP Conversion

What are GRD files?

GRD is a file extension shared by several grid formats, which store a map as a regular net of cells with one value in each cell. The best known is the Surfer grid of Golden Software, used for contour maps and 3D surfaces of elevation, geology, and other measured data, and it exists in text and binary versions. The Northwood numeric grid, created for the Vertical Mapper add-on and now associated with MapInfo, serves a similar purpose and is common in mapping and telecom planning. The R programming environment uses .grd for the header of its native raster files, with the values kept in a separate .gri file. Because the same extension covers all of these, the contents of a file, not its name, tell which one it is.

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 GRD to STP?

Yes! reaConverter instantly converts .grd 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 images 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, GIS data among them. For GRD to STP it replaces the usual detour through QGIS, ArcGIS or ogr2ogr: add the files, pick the output format, and the whole batch converts offline. Surveyors, planners and engineering teams use it to pass data between GIS, CAD and everyday document 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 GRD to STP online?

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

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

The best way to change GRDs 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 GRD to STP.

How can I automate GRD 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 GRD 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 grd to stp converter for batch processing.

What else can I do with reaConverter?

Convert RAW formatsConvert PDFAdd text on picturesConvert GIS filesConvert Gerber images

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