32 or 64 bit Irfanview?
Starting with IrfanView 4.40 there is also a 64-bit version available.
Advantages of IrfanView 64-bit over 32-bit version:
It can load VERY large files/images (image RAM size over 1.3 GB, for special users)|
Faster for very large images (25+ Megapixels, loading or image operations)
Runs 'only' on a 64-bit Windows (Vista, Win7, Win8, Win10)
Advantages of IrfanView 32-bit over 64-bit version:
Runs on a 32-bit and 64-bit Windows
Loads all files/images for normal needs (max. RAM size is about 1.3 GB)
Needs less disc space
All Plugins will work: not all Plugins are ported (yet) to 64-bit (like OCR) and some 32-bit
Plugins must be still used in the 64-bit version, some with limitations (see the "Plugins32" folder)
Some old 32-bit Plugins (like RIOT and Adobe 8BF Plugin) work only in compatibility mode in
IrfanView-64 (only 32-bit 8BF files/effects can be used)
Command line options for scanning (/scan etc.) work only in 32-bit (because no 64-bit TWAIN drivers)
You can install both versions on the same system, just use different folders.
For example: install the 32-bit version in your "Program Files (x86)" folder and the 64-bit version in your "Program Files" folder
(install 32-bit Plugins to IrfanView-32 and 64-bit Plugins to IrfanView-64, DO NOT mix the Plugins and IrfanView bit versions)
The program name and icon have some extra text in the 64-bit version for better distinguishing
To create a portable version of Irfanview, just copy the Irfanview folder to a flash drive or other portable device