7 Free Image Optimizer Tools for Compressing and Preserving Photos


TinyPNG

TinyPNG is one of the fastest and easiest image optimizer tools out there. Despite its name, the tool works with both PNG and JPEG image file types, using smart lossy compression techniques to minimize file sizes.



The tool works by selectively decreasing the number of colors in your images, which helps reduce the size and appears unnoticeable when compared to the original images. All you have to do is drop your image files into the uploader at the top of the screen (no account creation required) and wait. Upload individual images or do them in bulk.

Compressor.io

Compressor.io is a fantastic tool that has a bit of an advantage over TinyPNG since it can be used to optimize GIF and SVG files in addition to PNG and JPEG files. It uses both lossy and lossless compression techniques to optimize images with high compression rates, helping users reduce their image file sizes by as much as 90 percent. The only downside to this tool is that a bulk image upload option is not yet available.



Compressor.io provides an example of a compressed image with a slider that you can use between the original and the end result. Chances are you won't be able to tell the difference. Just click "Try It!" below the example image to start uploading your own.

Optimizilla

Optimizilla works quickly and seamlessly, using a combination of optimization techniques and lossy compression to reduce image file sizes. The tool works only with PNG and JPEG files, but you can upload a batch of up to 20 at a time. As your images are queued up to be compressed, you can click on their thumbnails to customize their quality settings.



Once an image has finished compressing, you'll see a side-by-side comparison of the original and the optimized one. You can zoom in or out to get a closer look at both and adjust the quality setting using the scale on the right side. The difference in size is shown at the top of the image previews with a button just above that to download all images that were uploaded and compressed.

Kraken.io

Kraken.io is a freemium tool that's worth trying out if you're serious about image optimization and may be willing to pay a small fee for advanced optimization and high-quality results. With the free tool, you can upload images of up to 1MB in size to be optimized using one of three advanced optimization methods: lossy, lossless or an expert method with customizable options.



The free version of Kraken,io might be all that you'll need, but premium plans are available for as little as $5 a month. A premium plan will allow you to upload more/larger images while giving you access to a wide range of advanced features like image resizing, API access, better use of the Kraken.io WordPress plugin and more.

ImageOptim

ImageOptim is a Mac app and web service that reduces image file sizes while maintaining the best possible quality. You can use it to customize the quality settings so that you have complete control over what kind of results you get.



The tool uses lossy compression plus a convenient drag-and-drop feature to upload and optimize JPG, GIF and PNG image files. One of the advantages of this tool in comparison to others is that it offers configurable lossy optimizations so that you can keep the image quality high at a larger size after compression or enable lossy minification if you're interested in getting the smallest file size possible.




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