Batch Resize Images with Gimp

Most digital cameras nowadays, have resolutions that are far bigger than the normal monitor screen size. On average most point-and-shoot digital cameras have resolution anywhere from 3 megapixels to 10 megapixels. Most monitors these days have resolution of either 1024×768 or the slightly larger 1280×1024 pixels.

If you ever need to upload pictures online to a gallery or to a webpage, you will need to resize your images to fit the screen as well as reduce the image size. If you use Gimp, an image manipulation program, you can use David’s Batch Processor, a Gimp plugin to manage the resizing of multiple images in a single command.

To download the Batch Processor, open your Synaptic Package Manager located under System > Administration. Search for “Gimp Batch” and the result will give you “gimp-plugin-registry.” Install the package. You may need to supply the admin password to continue.

Start Gimp. Access the batch file plugin via the Xtns > Filters > Batch > Batch Process menu.

You can select a single file or multiple images for our purposes here in this article. Just click over to the Resize tab and choose resize aspect ratio or set the absolute width and height. Click Start to begin the batch process.

So, the next time you have to resize multiple images. Use the Gimp’s Batch Processor, a batch plugin that is capable of resizing multiple images in just a few clicks.

57 thoughts on “Batch Resize Images with Gimp

  1. huh …. hmmm … ive heard arguments that gimp rivals photoshop … I seriously doubt that but this type of functionality has been present in Adobe products for sometime.

  2. I can’t afford CS3. Gimp is free. I’ve been extremely happy with Gimp. It may not be as mature as CS3, but for the price. I’ll take it any day. Updates are free, too.

  3. gimp totally rivals photoshop in every way, at least for those of us with a tablet who actually draw, and don’t need to rely on Alien Skin eye candy plugins. In fact, I prefer drawing/painting/digital airbrushing in gimp over photoshop anyday, have for years now… Batch resizing can be done out of gimp using scripts and imagemagick, but it’s nice sometimes to just point and click :)

  4. You said:
    “open your Synaptic Package Manager located under System > Administration. Search for Gimp Batch and the result will give you gimp-plugin-registry.”

    gimp-plugin-registry dos not exist. What now?

  5. Mike, you may want to “Search” for it not “quick search” which means you have to click the binocular-shaped button first.

  6. Hi,
    Thanks a million for this…just what the doctor ordered!
    One note that might be helpful for others:
    Access the batch file plugin via the Xtns > Batch Process menu.
    Using Gimp 2.6.1 running on Ubuntu there is no Xtns pull down. Batch can be found under Filters > Batch

    1. I noticed this also when I got the latest Gimp. They’ve rearranged the menus a little bit. Thanks for the correction. I’ve updated the post.

  7. Hi have just downloaded the latest Gimp,
    Trying to batch resize some pictures and am confused with how to do it! please help lol
    I’ve looked at filters but can’t find anything batch wise???
    thanks

  8. But there are (still) smaller and free prog/soft that does the resizing even more easier: Visualizer Photo resize, JPG 4 Email, etc. Just drag the corner of it…et voila.

  9. Ok…I’m probably retarded, but for the life of me, where is the system > administration in leopard? Can’t find it in system preferences, utilities, etc. Please help, this is stupid..

    1. From Gimp.org:

      GIMP for Mac OS X

      The GIMP team doesn’t provide official Mac binaries. You can, however, install GIMP 2.6 easily on the Mac using the packages provided by GIMP on OS X.

      Download GIMP 2.6 – Choose a package from the Downloads page
      Running GIMP on Mac OS X requires Apple’s X11 environment. It is included on the “Optional Installs” package on the OS X install disk.

      1. I have already successfully installed GIMP 2.6.8. I was trying to get the plug-in for the batch resize, but there is no package to install in downloads. The instructions to install the batch-resize say “To download the Batch Processor, open your Synaptic Package Manager located under System > Administration.” I can’t even find System, let alone, Administration or Synaptic Package Manager. Is this actually a feature of Leopard or am I missing something? Others seem to have had no difficulty.

        1. Sarah, System>Administration is a menu system for Ubuntu only. I write mostly about Ubuntu in this blog. The Synaptic Package Manager I was referring to is a software database for Ubuntu. It doesn’t look like there is a Mac version of David’s Batch Processor. I just checked his site. You can check this site if they ported any plugins for the Mac.

          http://www.gimp.org/macintosh/

  10. is it possible through this extension to flip images? I’ve got hundreds of png’s to flip, could any one help me to automate this transformation?

  11. from gimp documentation:

    “Flip An Image

    When you need the person in the photo looking in the other direction, or you need the top of the image to be the bottom. Mirroring the image (sort of). Use Tools ? Transform Tools ? Flip, or use the button on the toolbox. ”

    i need to do that with almost 500 files, maybe some one could write me a quick fu script or something if this batch processor is unable to do that.

    i would be vary grateful

    1. Hi Simon, The Batch Process can rotate images, but not flip. One suggestion, it looks like you can record your strokes with Script-Fu. I haven’t tried it. I’ll do some checking online if someone has written a batch with a mirror function.

  12. I really appreciate your concern in this matter ulyssesr :) however it’s no longer an issue, i’ve managed to flip my files with gThumb picture viewer, who would thought that the easiest solution lies in program delivered with ubuntu ;)

  13. was doing a photo slideshow for my Uncles 25th marriage bDay and had to resize about 200 pics it worked like a charm, grats for the tip :D

  14. Thanks, this was really helpful. There’s a windows version on the page you linked too, for those (like myself) stuck with them.

  15. To bad you cannot batch resize with absolute values and constrain proportions. Correct me if I’m wrong but I only saw constrain proportions with relative values as in percentages.

  16. Hello, I read all the comments on batch resizing and I cant’ figure it out PLEASE walk me through this PLEASE!

  17. i have windows and there is only file,edit,select,view,image,layer,colors,tools,filters,and help as options. I NEED BATCH RESIZING OPTION ANYONE!!

  18. Hi Ulysses,

    I’m new to GIMP and have a whole lot of images to be resized and watermarked.
    How to install and execute batchworks.py plugin with GIMP on Windows XP ?

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