Irfanview: how to zoom-in without having the image blurred; I need it for GUI development to see large pixels.

  • What type of files are they, and does if Infranview can't do it, does it have to be that program? – KCotreau Jun 29 '11 at 13:46
  • Usually, it are screenshots. Well, IrfanView is my choice of small and fast image viewer since ages. I've tried a couple of alternatives, but they lack at different areas - mostly in usability. – Mike L. Jun 30 '11 at 7:12
  • The exact file type matters. Some scale (.jpg), some are pixels (.gif) – KCotreau Jun 30 '11 at 7:20
  • I'm talking about screenshots (taken with [Alt+]Print, then pasted), not about viewing files. – Mike L. Jul 1 '11 at 8:38

I found the solution by reading changelog

New display option: Use Resample for zooming (Menu: View->Display options)

So from "View" menu, select "Display options" and turn off "Use resample".

  • 6
    I had to adjust zoom for the setting to kick in. – NiteCyper Aug 6 '15 at 5:46
  • Thanks--I've been wondering why suddenly Irfanview was no longer giving me a precise zoomed view of my images! – Jon Coombs Sep 11 '16 at 1:25
  • Thanks! baffling to me that there are a separate set of options which are not under the Options menu. – uglycoyote May 28 at 23:22

What you're looking for is technically known as "Nearest Neighbor Interpolation".

i would use an application like

  • Microsoft's ZoomIt
  • Magnifier
  • Photoshop

they all 'preserve hard edges of pixels'.

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