I just got a new job as a web designer that involves a lot of photo editing, but my work computer is a Mac, which I've not used extensively. I've got Gimp working fine on it (as well as Photoshop, to make my boss happy), but right now, I'm using Photoshop's 'Save for web' feature, once I've finished editing the files on Gimp. Advertisement There are two ways to optimize single images in GIMP. To optimize or convert multiple images in Windows, you’re probably better off using the ultra fast image viewer, which has an excellent batch conversion feature, or any dedicated mass image manipulators like the ones you can find (for Windows users). You could skip using GIMP altogether and utilize the batch converters instead, but I prefer to monitor changes in quality in the images that I’m trying to optimize. Some images from batch converters can turn out so grainy because the optimization levels for one image can heavily degrade another one, that you might just have to re-convert. In any case, one of the two ways requires a plugin from the registry, while the other one is a bit more manual but nothing too time-consuming. So we shall start with that so you can decide which one you prefer. With No Plugin Let’s say you have a raw screenshot straight from the source. A lot of the time, the resulting screenshot can turn out huge in file size. Just take Windows Vista and 7’s Snipping Tool. It creates high-quality screenshots, but in no way optimizes when you’re saving the file. Compared to the screenshot saved with my preferred screencapture utility,, the Snipping Tool’s file was almost 4 times as large! So when you obtain an image file like that, drag it from Windows Explorer to the GIMP window, head to Image > Mode > Indexed. Just make sure you check the box to “ Show the Preview in Image Window“, as it will display the potential file size in the same dialog while you can still monitor the quality of the image. In this case, the resulting file turned out to be 458KB, which is still smaller than the original one. With Plugin is a plugin from the registry that will create an option to optimize the image for web use under the File menu. Download either the zip or the tarball file. You need the exe file in the contents of the zipped file in your. If you don’t know where your plugins folder is, you can find the location by going to Edit > Preferences in GIMP. Now expand the Folders option and highlight Plug-ins. That’s the folder you want to copy the exe file (webexport.exe) to. Now restart GIMP (remember to save your work) and you’ll notice the new option under the File menu. When you’ve got an enormous file, you can use this option to preview the file size according to the file type you’re interested in saving. You can already preview the file size natively in GIMP when dealing with JPG files, but this plugin gives you the same option for PNG files, which are most likely what you want for your screenshots. Using this plugin, I was able to get a 186KB PNG file with 8 bits per pixel, which is great compared to the 400+ KB (24-bit) file using no plugins like detailed above. The quality was virtually the same, as far as I could tell. I haven’t tried this, but there’s apparently another plugin, (Radical Image Optimization Tool), which IrfanView uses to optimize images. What do you use to optimize screenshots? Image credit:, Explore more about:,,.
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