Quickly shrink image files with IrFanView

This quick tip might save you some time (and would have saved me some time last month if I had found it then).  When I have a lot of photos that I want to keep, but that aren’t priceless (e.g. family and friends), I don’t want them to take up huge amounts of space.  Unfortunately, cameras keep producing larger and larger files as the resolution goes up.  There are some options, however.

  1. Delete the images you don’t want
  2. Shrink the images you have without changing the resolution or visually reducing the quality

The second one it’s possible because the human eye can’t see all of the detail that a jpeg file contains (assuming that is how you have stored your images).  Online services have always taken advantage of this by shrinking files that you upload.  It’s pretty handy to for  yourself too.  If you save photos like I do,  you’ll find that your storage needs are increasing at an alarming rate as the size of photos (and in my case number of photos as well) increases.

Resizing quickly

The more photos you have, the less time you want to spend on each. IrFanView is an invaluable (and free!) tool that you should have anyway – it’s packed with features that would take a long time to figure out.  I just found this one, so here’s a quick explanation of how to find and use the feature:

  1. Open IrFanView, then go to File->Batch Conversion/Rename
  2. The conversion window opens

Batch conversion dialog


  1. Leave selection as Batch Conversion
  2. Click Options next to output format (after selecting JPG)
    1. set lower quality 80 to get smaller sizes
  3. Click to save those options
  4. Set output directory
  5. If overwriting existing files
  6. click “use advanced options”
  7. Click “Advanced”
  8. Check “overwrite existing files”
  9. If resizing, set this under advanced options as well (such as % of original)

Advanced settings for batch conversion

  1. Click Start Batch
  2. That’s it!  Observe the smaller sizes.  Check the quality – you may need to tweak the settings to match your balance for size/quality.

Perhaps if I integrate this into the way I store off my photos, I can shrink the unimportant photos (such as pictures of repairs, misc. pictures that I might care about later, etc.) without much effort.  At the very least it can help keep my project record directories under control.


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About ProjectJourneyman

I am a software engineer that escaped the cubicle world at a large company to go solo with Android app development. My attention to detail and quality applies both to my apps and to my research on how to make money with Android. Now that I have the freedom to work on my own projects, I am documenting my efforts in the hopes that it will help other current or aspiring independent Android developers get the income they desire.

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