How to Convert Multiple HDRI Images to ICO?
1. Download and Install reaConverter
reaConverter is a standalone Windows app — download, install, and start converting HDRI files in under two minutes. Built-in editing tools let you resize, crop, or watermark as you convert.
2. Load your HDRI files
Start reaConverter and add your .hdri files. The software processes everything locally, so your files never leave your computer.
Use drag-and-drop, folder browser, or right-click conversion from Explorer.

3. Select ICO as output format
Select ICO from 700+ supported output formats. Choose your destination folder and adjust settings to match your needs.

4. Start HDRI to ICO conversion
Click Convert to start the batch. reaConverter processes files quickly and shows you the status of each one.

Once done, reaConverter shows a summary. Click 'Show converted files' to jump straight to your ICO output.







