GRB2 → IGS · Windows

Convert GRB2 to IGS

GRB2 to IGS for whole archives of tiles, layers or survey files at once, with nothing uploaded and no account required.

Tired of converting GRB2 files one at a time? reaConverter processes entire folders to IGS automatically. Handles large batches reliably without crashes or timeouts. No command line and no scripting, unlike the usual ogr2ogr route.

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GRB2 to IGS
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.grb2.IGS
4.8

Converting files since 2001

Runs offline — nothing uploaded

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How to Convert Multiple .grb2 Files to .igs?

1. Download and Install reaConverter

Download reaConverter and install it in seconds. The setup is straightforward — no complex configuration, no extra software required.

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Install reaConverter

2. Load your GRB2 files

Add GRB2 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 GRB2 files into reaConverter

3. Select IGS as output format

Set IGS as output format and select where to save your converted files. Customize quality settings if needed.

Select IGS as output format

4. Start GRB2 to IGS conversion

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

Start Conversion

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

Step by step

How It Works

reaConverter offers the fastest, simplest solution for converting your GRB2 files into IGS without GIS software - all files processed on your PC for maximum privacy and speed.

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Technical note

GRB2 to IGS: what carries over and what does not

Geospatial coordinates are absolute positions on the earth, and they are large: a projected easting runs to six or seven digits, while latitude and longitude are small decimals. IGS expects a drawing laid out near its own origin in millimetres or inches. The geometry itself converts correctly, but it can land tens of kilometres from 0,0, or arrive at a scale where an entire county is forty units across. Zoom to extents first, then measure one known distance before dimensioning anything. How good the result is depends almost entirely on the GRB2 going in. Clean line art, a logo or a drawing scanned at 300 dpi or more traces into geometry you can work with. A photograph does not: continuous tone has no contours to follow, so tracing it produces thousands of tiny shapes and a file nobody can edit. Scan or export at the highest resolution available, and prefer a lossless original, because compression artefacts along an edge become ripples in the traced path.

Map Data Workflow

From map data to a working drawing

Site plans, utility routes and parcel boundaries often start out as GRB2 and end up in IGS. reaConverter turns the layers into drawing entities in batch, so a full project folder moves across in one run.

  • Convert every layer in a folder to IGS with the same settings
  • Go the other way too, from DWG to Shapefile, when the GIS team needs the drawings back
  • Render the same data to PDF for a quick review copy
  • 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
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
I run a small design agency, and reaConverter has saved me countless hours. The batch processing is lightning-fast, and the ability to convert hundreds of files into different formats at once is a game-changer. Highly recommend!
Mark T.
Mark T.
Satisfied Customer
5/5⭐ Finally! Does what it promises - converts AND tweaks images without complicated menus. Perfect for quick jobs.
J. Mitchell
J. Mitchell
Satisfied Customer
reaConverter is pure gold! Rock-solid performance with zero crashes. No internet needed—perfect for travel or low-connectivity work. The ultimate offline alternative to sketchy web converters. Plus, the desktop version keeps sensitive files secure since nothing ever gets uploaded to the cloud.
Malik T. Martin
Malik T. Martin
Satisfied Customer
I was skeptical at first, but reaConverter exceeded my expectations. The interface is intuitive, and the advanced settings let me tweak outputs perfectly. Plus, the customer support is fantastic!
Sarah Lane
Sarah Lane
Satisfied Customer

FAQ

GRB2 to IGS Conversion

What are GRB2 files?

GRB2 is a file extension for the second edition of GRIB (General Regularly-distributed Information in Binary form), a World Meteorological Organization (WMO) standard for gridded weather, ocean, and climate data. Compared with the first edition, GRIB2 describes the data in greater detail and with higher precision, including coordinates stored in micro-degrees and a larger range of parameters, vertical levels, and message lengths. A file of this type is a series of messages, and a single message can contain several data fields that share the same origin and date. National weather services use it to distribute model forecasts, radar-derived products, and ocean and wave data. The same format is also found with the .grib2 and .grb extensions.

What are IGS files?

The IGS (Initial Graphics Exchange Specification) file format is a standardized CAD data exchange format used to transfer 2D and 3D model data between different CAD systems. Developed in the 1980s, IGES ensures compatibility across various engineering and design software by storing geometric data, annotations, and structure in a neutral ASCII or binary format.

Can reaConverter convert GRB2 to IGS?

Yes! reaConverter instantly converts .grb2 to .igs 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 GRB2 to IGS 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 GRB2 to IGS online?

If you only need to convert a few GRB2 files to IGS format, feel free to try our free online free online GRB2 to IGS converter — perfect for small batches with no installation needed!

How can I turn GRB2 files into IGS on my computer?

The best way to change GRB2s to IGSs 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 GRB2 to IGS.

How can I automate GRB2 to IGS 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 GRB2 files to IGS using the command prompt?

reaConverter provides full access to all its features via Windows command line, including a high-performance command-line grb2 to igs converter for batch processing.

What else can I do with reaConverter?

Convert PDFAdd watermark on imageConvert GIS filesConvert Gerber imagesChange image color space

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