![]() ![]() TinyPNG uses smart lossy compression techniques to reduce the file size of PNG images. TinyJPG does compression of JPEG images and is able to produce great quality JPG images at a very small size. The free web interface allows file uploads of up-to 1mb and you can upload multiple images at once for compression. Kraken.io offers a free online image optimizer which can do lossy or lossless compression of many image formats include PNG, JPG and SVG. Alternatively, you can use any of the free image optimization tools listed below to manually compress images. If you are using Gulp or webpack, then you can find node modules (see the end of the article) that can be integrated into your development workflow and help you auto optimize images before generating and publishing the website. Note that some of the compression algorithms can reduce the image quality, however if you are wisely choosing the compression level then you should be able to get a good quality compressed image.įor a font-end developer, it is much easier to include image optimization tool in their front-end workflow. This post lists down free tools which can help you compress your images to a smaller size. The optimization starts with reducing the dimension of the image to an optimal size required to fit inside your website content.įurther optimization can be done by compressing them using an image compressor. However, these image formats tend to be larger in size unless you optimize them before using. There are many image formats supported inside browsers: PNG, JPG and GIF are some of the most popular image formats available which are widely used across websites. In this article, we are listing free tools and resources which can help you reduce image size before using them in your websites and web apps. Whenever you are using images in your front-end projects, you may want to ensure that you are using an optimized version of that image. ![]() We only have to make sure that images are coded with the proper orientation and with a sRGB profile, adhering to good color management practices.Heavy and un-optimized images are the biggest reasons for slowing down a site. We should get rid of metadata before publishing on the web. Their weight can easily get 20 KB or more per image. While they may be useful for editing and management purposes, they have no impact on how images show in our web. Get rid of metadata.įrom shooting to editing, images accumulate metadata, like exif data. You can still use a perceptual metric to better protect quality and further squeeze weight – this is an option available in some cloud image optimization tools. We can do this with a powerful open source suite like ImageMagick and simply set a quality factor (typically 75 to 85) for JPEG (and WEBP) images. It may save 10-30% of image weight with very similar quality, perhaps some more blur and less ringing.įor an up to date revision you may check out this article on image formats for web. You may consider offering WEBP for Chrome, Edge, Firefox and Android users, keeping JPEG as fallback for Safari and iOS. PNG may work better with graphic designs featuring solid colors, but in these cases it may yield lower weight with better quality. If you need help on choosing your breakpoints, check out this article on the best image sizes for web. Ideally, we'd make our website responsive by setting different breakpoints and delivering images that fit in our users' displays. We should always set and enforce a maximum image resolution in our website, for instance 2000 px width. It brings a big impact on weight with no visual quality penalty, as long as we don't make it smaller than the displaying resolution. ![]() Image resizing is the first and most important step. Whatever tool we use in our deployment, there are four main tasks that, at the very least, any pipeline should accomplish. There are many options to do this, from in-house developments based on open source libraries and suites – like ImageMagick – to cloud-based tools and APIs. So, whether we're creating or running a website, we should put in place an image transformation and optimization pipeline. This usually has the largest impact on loading time over other resources like JavaScript. And the weight of images usually accounts for a 40-60% of the data transferred on the web. The visual quality of pictures has a direct impact on the brand image and the message those images convey. Images are an essential ingredient of most websites. ![]()
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