HDRi Converter

Fast HDRI conversion for Windows. reaConverter processes large batches reliably without crashes or timeouts.

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reaConverter
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HDRI Files
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How to Convert .hdri Images in Bulk

1. Install reaConverter

Download reliable HDRI conversion software to convert multiple .hdri files and folders in one go.
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Install reaConverter

2. Select HDRI Files

Select HDRIs from a folder or drag and drop them into reaConverter, then choose the desired output format.
reaConverter - Load HDRI files

3. Start Conversion

Click Convert to start the bulk conversion of all selected HDRI images. The process will begin right away.
reaConverter - Start HDRI conversion

Convert HDRI on your PC

For quick and effortless HDRI file handling on your PC, reaConverter offers powerful conversion tools with batch processing. Best of all, it works entirely offline — ensuring your sensitive data never leaves your computer.

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Do more with your images

Converting HDRI images for use in a workflow? Touch up, transform, apply editing and effects to your images during conversion.

Our range of editing options includes such image processing actions as Resize, Rotate, Crop, Color Replace, Watermarks and more. Adjust actions include RGB, HLS, HSV, Brightness and Contrast. Auto-processing options are also available, such as auto-rotate and auto-crop.

Image editing tools
Image editing

User Reviews

Average User Rating:
Last updated on January 01, 2026
"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
"Enable shell integration for lightning-fast file conversions directly from Windows Explorer."
R. Lewis
R. Lewis
Happy User
"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 deal with hundreds of images daily, and reaConverter has been a lifesaver. The Watch Folders feature lets me automate file conversions without lifting a finger. I set up a folder for incoming files and it automatically resizes, renames, and converts them into the formats I need. It's like having a personal assistant!"
Sarah T.
Sarah T.
Graphic Designer
"After 200+ conversions on my budget laptop (i3-1115G4/4GB RAM/Win11), reaConverter outperforms heavyweight tools. Zero crashes, low CPU usage during batch processing, and no internet dependency - exactly what professionals need."
Walter Morgan
Walter Morgan
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

HDRI images: Frequently Asked Questions

What are HDRI files?

The HDRi image format (High Dynamic Range image with infrared) is a specialized 64-bit RAW format designed to capture and store a wide range of luminance levels along with additional spectral data. Unlike standard HDR formats, HDRi includes an infrared channel alongside traditional RGB data, enabling more detailed image analysis and post-processing, especially in scientific, surveillance, and remote sensing applications. Its 64-bit depth allows for extremely high precision and dynamic range, preserving subtle variations in light and shadow across all channels. This format is ideal for advanced workflows requiring both visible and non-visible light information.

Can reaConverter open HDRI files?

reaConverter fully supports the HDRi image format – open, edit, and export HDRI files to any other popular file format with ease.

How do I change HDRI to another format?

reaConverter is a user-friendly tool for converting HDRI files. Once installed on your computer, it allows you to convert all your .hdri files at once with just a few clicks. You can even convert hdri images directly from Windows Explorer using the right-click menu — fast and convenient.

Can I convert HDRI online?

If you only want to convert a few HDRI images, you are welcome to try our free online HDRI converter.

How can I turn HDRI files on my computer to another format?

The best way to convert HDRI images on your PC is to get 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 HDRI.

How can I automate HDRI files conversion?

reaConverter supports all the essential automation features, such as right-click сonversion and Watch Folders, for the most efficient automated file conversion in any software of its kind.

Can I convert HDRI files using scripts or the command-line interface?

reaConverter provides full access to all its features from the Windows command-line shell, including the command-line hdri converter.

What else can I do with reaConverter?

Copy metadata (EXIF, IPTC)Convert DICOM filesImage resizerSet manual file dateConvert PDF files

What formats can I convert a HDRI file to?
ai  apng  avif  bmp  bpg  cal  cg4  cgm  cin  dcm  dcx  dds  dgn  dis  drw  dwf  dwg  dxf  emf  epi  eps  fax  fits  flif  gbr  gif  hpg  hru  ico  iff  iges  igs  jp2  jpeg  jpg  jxl  jxr  mif  mtv  pcl  pct  pcx  pdf  pgm  pic  plt  png  ppm  prc  ps  psd  qoi  qrt  rad  rla  sgi  shp  svg  svgz  tga  tif  tiff  webp  webpll  wmf  wmz  wpg  wrl  xbm  xpm 

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Explore our efficient HDRI file converter that saves you time and effort by converting multiple .hdri files into different formats.
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