Resize multiple images Mac

As a blogger, I manipulate a lot of photos and images. One of my daily routine consists in resizing some images we use on iDB to either reduce their size or simply make sure they fit right on the site.

There are many different ways you can quickly resize several images at once on your Mac. You can use an Automator workflow or download one of the many apps available to do that job. Or, if you want to quickly resize several images on the fly without too much trouble, you can simply do the following.

How to batch resize pictures on Mac

Step 1: Select all the images you want to resize.

Step 2: Right click on them and select “Open With Preview.”

Step 3: In Preview, go to Edit > Select All.

Step 4: Once all images are selected, go to Tools > Adjust Size.

Step 5: Enter the width or height value to resize your photos to your liking. If you’re only going to resize the width for example, make sure “Scale Proportionally” is selected. This will ensure that your images are proportionally resized.

Step 6: Save and close.

That’s all there is to it. If you’re batch resizing images on a regular basis, I’d really suggest either downloading an app to do the job for you, or simply create an Automator workflow on your Mac. That will save you the trouble of repetitive tasks.

  • Modest

    More similar tips – how to’s please! 🙂

    • BoardDWorld

      Here’s another, a free meta/Exif viewer. While viewing the image in Preview simply press, command and i. Only reason I mention this is for some reason there are a ton of exif viewer apps for sale in the App Store.

  • Σαλαη αββας

    How to do it on windows , oh wait ! you can’t it’s a useless os

    • TheDras

      Cmon man.. Thats not funny..

      Well.. Actually.. It is.. BWHAHAHAHA

    • Σαλαη αββας

      So I can downvote myself ! Cool

    • ✪ aidan harris ✪

      Something like this?

      makeuseof .com/tag/use-gimp-to-batch-edit-your-images-windows-specific-instructions/

      • BoardDWorld

        One can expect to do just about anything with a 3rd party app, don’t you think?

    • Chuck Finley

      >most used OS in the world

      Sure buddy.

      • Σαλαη αββας

        Sure it’s most used ( I use it myself ) , however it’s like anderoid , many tech companies offer it with their computers , while OS X is only available from apple …. And it might be easy to get an apple product in the USA ( apple products are made to be real products ) but in many places in the world it’s not easy at all , you have no choice but to use wnidows ( comes built in crapy products ) ….. I’ve never seen an Apple Mac in my city -never-…..

      • Obaydok

        youre so true!

      • mehrab

        Most popular does not mean its the best. Its buggy slow and awkward.

    • Dan

      Actually you can, once you install the powertoy “resize image”. Then you can easily resize multiple of images in explorer by selecting the ones you want and right-click. Resize image is right on the context menu and you will be prompted with a few options. No software, no app. Very easy and handy.
      This works on XP, not sure with win7.

      • BoardDWorld

        The obvious point here is doing it natively. Mac OSX is a power house when it comes to “simple native” automation. You can’t compare. This is thanks to the system app called Automator and other native apps. Even installing third party apps will add functions to Automators Library. Then you can get slightly more technical using scripts to do even more.

      • Phil Davis

        You are 10 years behind…Mac applications have become much more complicated and now difficult to use…especially iMovie et al

    • Stacey O.

      Actually it’s VERY easy to resize multiple images on Windows. In fact, the only reason I’m here is because I’m trying to figure out how to do it on this MAC my job makes me use…

  • Adithya Sairam

    Good for themer’s!

  • Imahottguy

    Good to know! I had not considered trying preview for that function. It really is an underrated app. I use it to create/annotate/crop/secure/resize PDFs and crop/resize images often! Though I had not thought of using it for batch processing before.

  • rafaelpz

    They could add a field to batch rename the files. As far as I know you can’t do that without a 3rd party app. Ok, you can do it with an Automator task, but come on…

  • Brian Arnold

    Thanks, would have saved me a few bucks before buying a resize app…however the resize app can batch rename files. That app is called sizerox. I don’t need to rename the files, just saw other people’s feedback below. Thanks for the tip.

  • Eri Maruyama

    omg somehow I never realised that it can be done in preview.
    Thanks for the great tip!!!

  • Thanks!!

  • Phil Davis

    Did it…then exported them to file…when I put imported them to document…they resumed their former size…..

  • Terry Steiden

    UNFORTUNATELY!! You failed to mention that this re-sizes the ORIGINAL file and does not save a copy. If you are re-sizing to use on the web, you have just lost your original file for good!

  • lingtalfi

    Ahhhhh, life saver, love it

  • Jean-Louis Eveque

    Why download a new app when good old Preview does the job so well?

    Tried with Automator, does not offer a resize by height or width only, this tip saved me a lot of time.

    Thanks for posting it!