Our monitors are getting better and better and, of course, we want to make them profitable enjoying images with increasing resolution when browsing. The problem is that that does nothing but increase the weight of web pages, slowing down their loading (and thus degrading the user experience). Something similar applies with the images that we send through email and messaging apps.
Therefore, it is essential to have on hand tools that allow us to reduce the ‘weight’ of the images that we have to send or post on the Internet, and all this while losing the least possible amount of quality. We have selected some of the most popular below.
We have chosen as a reference to compare the degree of compression of the tools a 4.74 Mb image of the ‘Gioconda de El Prado’ extracted from the Spanish Wikipedia.
Optimizilla is the header image compressor for whom this has been writing for a couple of years now. Compatible with both JPEG and PNG files. One of its strengths is that it offers an interactive slider that allows you to compare the before (uncompressed) and after (compressed) of each image.
Useful if we want to compress many images simultaneously: allows us to upload 20 files in one go, and set a different compression level for each one.
Maintaining the 89% quality that is predefined by the tool, we have achieved that our test file is down to 1.1 Mb in weight.
Image converters, resizer, editor, rotator, meme generator … ILoveIMG seems to have all kinds of tools for online images. Among them, of course, a compressor that allows us to upload images from our computer, or from Google Drive or Dropbox.
Very comfortable to be used from a mobile phone, this tool allows you to compress several images at the same time, and its performance is remarkable, having managed to compress our example image to 952 Kb in size.
EzGIF is another example of a web that groups together multiple tools related to images (including the generation of GIFs). Among these, in addition to utilities to generate GIFs, we will find, separately, compressors for GIFs, PNGs, JPGs and WebP images, being the only one with this last function. All of them have a limit of 35 Mb per image.
Another function that the competition does not have: In the case of JPGs, EzGIF allows us to indicate the maximum size we want the compressed image to have, and the The tool is responsible for calculating the necessary compression level.
When it comes to compressing, applying a default quality level of 80%, the resulting test file has weighed 917 Kb.
Compressor.io is a tool that offers us two types of compression: a ‘lossless’ quality (available only for JPG and PNG images) and another ‘lossy’, also available for GIF and SVG images.
Its user interface is simple and, like Optimizilla, it offers us the option of comparing the two versions of the file, compressed and original, using a slider. The bad thing is that its maximum limit for the size of the files to be compressed is only 10 Mb.
GiftOfSpeed is a platform with up to 19 tools aimed at optimizing web loading time. The only one that interests us today is its JPG image compressor and resizer, which allows you to configure a certain level of compression, and alter both the width and the height of the image at the same time that we compress it.
Our example image was subjected to compression level 80 (default setting) and went from occupying 4’74 Mb to 911 Kb.
Kraken.io is a tool compatible with JPG, PNG and GIF files. Although it has payment options (the cheapest option is $ 5 per month), offers (as long as we register) a free option for images up to 1 Mb and with a cap of 100 Mb per month.
It gives us the option of uploading a ZIP that groups all of our images to be compressed, or of importing them from various accommodations in the cloud (Google Drive, Dropbox and Box). It has its own cloud to keep the compressed images there until we need them.
And, if we have a website that uses WordPress or Magento as a content manager, it gives us the option to integrate your image compressor directly on our website, as a plugin.