PUBLIC MARKS with tags image & optimisation

ImageOptim makes images load faster Removes bloated metadata. Saves disk space & bandwidth by compressing images without losing quality.

Trimage is a cross-platform GUI and command-line interface to optimize image files for websites, using optipng, pngcrush, advpng and jpegoptim, depending on the filetype (currently, PNG and JPG files are supported). It was inspired by imageoptim. All image files are losslessy compressed on the highest available compression levels, and EXIF and other metadata is removed. Trimage gives you various input functions to fit your own workflow: A regular file dialog, dragging and dropping and various command line options.

A cross-platform tool for losslessly optimizing PNG and JPG files.

"ImageOptim is a front-end (GUI) for set of tools for optimisation of PNG/JPEG images and GIF animations. Optimisation makes files smaller (in terms of disk space) by finding optimal compression parameters and by removing unneccessary information, like file comments, EXIF tags and color profiles."

ealing with browser caching is a balancing act. On one hand, you aim to minimize load times and bandwidth use by ensuring that images, scripts, and style sheets are cached by your visitors; however, you still want to ensure that they’re accessing the most recent versions of all your files. In this article, I’ll show you a few methods for controlling how your site’s files are cached by browsers so you can achieve the best of both worlds: maintaining optimal performance while ensuring that any updates are seen immediately, without a hitch by all of your users.

punypng is a free optimization service that can dramatically reduce the file size of an image by converting it into a highly-compressed, lossless PNG image. Whether you have a GIF, JPEG or PNG, use punypng for outrageously fast page loads and help make the web more puny!

CSS-IG.net a pour thèmes principaux l'optimisation des images Web et le potentiel du format PNG (Portable Network Graphics), recommandé par le W3C. Il s'adresse aux techniciens d'interfaces Web soucieux de la performance de leur site.

Pngcrush

optimisation du poids des images (suppression des meta, ...)

CSS Sprite is a single image file which contains several graphics. Using CSS background positions it’s possible to display any one of the graphics. By using a sprite you save on multiple http requests which helps speed up the rendering of your page.