GTI → HPG · Windows

Convert GTI to HPG

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

Manual GTI to HPG conversion wastes hours. reaConverter automates the process — just add files and click Convert. Everything happens offline on your computer. No uploads, no cloud risks. Surveyors and planners use it to pass GIS data to colleagues who work in other software.

DownloadGTI to HPG ConverterConvert
GTI to HPG
Online
.gti.HPG
4.8

Converting files since 2001

Runs offline — nothing uploaded

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How to Convert Multiple .gti Files to .hpg?

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 GTI files

Launch reaConverter and load the GTI files you want to convert. Add a few files or thousands, batch processing handles them all.

Drag-and-drop GTIs directly into reaConverter or use the folder browser to load entire directories.

Load your GTI files into reaConverter

3. Select HPG as output format

Pick HPG as the output format. Set the destination folder and optionally configure resolution, quality, or file naming.

Select HPG as output format

4. Start GTI to HPG conversion

Press Convert to begin processing. You can watch the progress or minimize and let it run in the background.

Start Conversion

Your converted HPG files will appear in the destination folder as soon as processing completes.

Step by step

How It Works

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

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Technical note

GTI to HPG: what to expect from the conversion

GTI holds no pixels of its own. It is an index: a list of other raster files plus instructions for mosaicking, clipping or rescaling them, so it converts only when every file it points to is present at the path it records. A GTI copied to another machine on its own produces nothing usable. Converting to HPG renders the assembled result into one real file, which is often the whole reason to do it. A GTI file has a pixel count and a DPI value, and no real-world size at all. HPG is a drawing where one unit means one millimetre or one inch, so the conversion has to assign a scale. Set the DPI before the run rather than resizing afterwards, then measure one feature of known length in the output and scale the drawing once to match it. Everything downstream, from dimensioning to cutting, rests on that single check.

Map Data Workflow

Turn GIS data into something anyone can open

A map saved as HPG opens on any computer and any phone. reaConverter produces those from GTI in batch, entirely offline.

  • Render every file in a folder to HPG 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
Finally, an HPG Converter That Just Works! Last week, we processed 237 HPG blueprints in 18 minutes. Previously, this took half a workday!
Kevin Nguyen
Kevin Nguyen
Satisfied Customer
reaConverter handles HPG files flawlessly. I use it to convert plot files to PDF for approvals, and the output is always accurate. The automation through Watch Folders and command-line is a big plus for speeding up our workflow.
Daniel M.
Daniel M.
Mechanical Engineer
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
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

FAQ

GTI to HPG Conversion

What are GTI files?

GTI (Raster Tile Index) is a small file that turns a large collection of map or image tiles into one seamless virtual picture. Instead of storing any pixels, it points to the individual raster files, which may be aerial photographs, satellite scenes, or terrain tiles, and describes where each of them lies on the map. A program that opens the GTI file sees one continuous image and loads only the tiles needed for the visible area, which makes it practical to work with archives of thousands of files without merging them first. The format appeared in 2024 and is stored as a short XML file with the .gti extension, or as a tile index in a GeoPackage or FlatGeobuf file.

What are HPG files?

HPG is a vector image format created in a standard programming language called HPGL (Hewlett-Packard graphics language). Other extensions created in this language include PLT, HP2 and PL2. All are called "plotter files" and are created by drawing programs such as AutoCAD to be printed using a device specialized in vector graphics. An HPG file uses a line series of two-letter codes to render an image and can also include parameters.

Can reaConverter convert GTI to HPG?

Yes! reaConverter instantly converts .gti to .hpg 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 GTI to HPG 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 GTI to HPG online?

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

How can I turn GTI files into HPG on my computer?

The best way to change GTIs to HPGs 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 GTI to HPG.

How can I automate GTI to HPG 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 GTI files to HPG using the command prompt?

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

What else can I do with reaConverter?

Convert GIS filesConvert RAW filesTrace images to vectorChange bit depthConvert vector files

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