E57 → HPG · Windows

Convert E57 to HPG

Online converters slow with large E57 files? reaConverter converts to HPG on your desktop, with no upload and no queue.

Batch E57 to HPG conversion doesn't have to be complicated. reaConverter processes entire folders with consistent quality settings. Works offline with no internet required, so you can convert anywhere, anytime.

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E57 to HPG
Online
.e57.HPG
4.8

Converting files since 2001

Runs offline — nothing uploaded

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How to Convert Multiple .e57 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 E57 files

Open reaConverter and import your .e57 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 E57 files into reaConverter

3. Select HPG as output format

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

Select HPG as output format

4. Start E57 to HPG conversion

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

Start Conversion

Conversion complete? Your HPG 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 E57 files into HPG without GIS software - all files processed on your PC for maximum privacy and speed.

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Technical note

How E57 and HPG differ in practice

E57 is made of pixels and HPG stores geometry, so the conversion traces the image into real lines, arcs and polylines. The result is editable in CAD: entities can be selected, snapped to and measured, rather than a bitmap wrapped inside an HPG container, which is what a viewer or a lightweight converter usually produces. It is still derived geometry, so expect contours rather than a structured drawing. Dimensions, blocks and meaningful layer names were never in the E57 to begin with. An E57 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 E57 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
An ultra-fast solution for minimizing file sizes. The entire conversion process takes just 3 minutes!
Logan B.
Logan B.
Satisfied Customer
I use the online converter — it’s quick and hassle-free!
Jian Wong
Jian Wong
Happy Online User
Working in a print studio means constantly juggling obscure file formats. I used to waste hours Googling converters or installing random software — until reaConverter became my Swiss Army knife. Install it once, and you're set forever. No internet? No problem!
Helen Evans
Helen Evans
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

E57 to HPG Conversion

What are E57 files?

E57 is a vendor-neutral file format for data from 3D imaging systems such as laser scanners, standardized as ASTM E2807 by the ASTM E57 committee. A file of this type can hold point clouds, 2D images, and the metadata that describes how they were captured. Its image part stores the photographs taken at each scan station, including panoramic, flat, and cylindrical views, together with the camera type, position, and orientation of every picture. The images are kept as compressed JPEG or PNG blocks, and an optional mask can mark the pixels that contain valid data. A file begins with the ASTM-E57 signature, includes an XML section that describes its structure, and stores the binary data in checked pages. The format is used in surveying, construction, and heritage documentation to exchange scan data between different programs.

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 E57 to HPG?

Yes! reaConverter instantly converts .e57 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 E57 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 E57 to HPG online?

If you only need to convert a few E57 files to HPG format, feel free to try our free online free online E57 to HPG converter — perfect for small batches with no installation needed!

How can I turn E57 files into HPG on my computer?

The best way to change E57s 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 E57 to HPG.

How can I automate E57 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 E57 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 e57 to hpg converter for batch processing.

What else can I do with reaConverter?

Convert Gerber filesChange color spaceConvert RAW photosConvert PDF filesWatermark images

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