It reduces the amount of memory and disk space needed, allowing more content to fit into a given space. Image compression is a useful method to optimize graphics files for storage or transmission. Otherwise, uploading to a service like SlideShare compresses while ensuring universal access.Presentation design services : What is image compression? There are some other hacks for PowerPoint which might compress the file, which may be useful if you must save in an old format:Įven more than Acrobat, it is important to compress PowerPoint for efficient transmission. To compress them, you can use another built-in option. More than Acrobat, PowerPoint users embed large audio and video files as part of their presentation. Newer versions of PowerPoint (using the tabbed horizontal layout) have an option under Pictures, as shown here: Also like Acrobat, there are a couple of things you can do to reduce file size substantially.įirst, compress those images. Like Acrobat, a site may contain a bunch of large downloadable PowerPoints which escape the normal WPO tests. Layout of PowerPoint is less sophisticated then Acrobat, but the relative ease of use make it a choice for many non-designers. Like PDFs, PowerPoint documents are widely shared. If anyone discovers that an online PDF compressor strips tags, let me know! Thanks to Mike Gifford at OpenConcept for this. Therefore, you might want to use the PDF Optimizer panel in Acrobat Pro, and make sure under “Discard Objects” that accessibility tags are still present. One problem with online PDF compressors is that they may set defaults you don’t want, in particular removing tags required for accessible and SEO-friendly documents. In short, any WPO strategy applied to a website should consider the PDFs provided by that site. Out of these, “Compress PDF” seems the most intuitive. The other option is to use an online compression tool. The options supported include downsizing images and removing personal information and comments. On a Mac, there is a slightly different method which involves using the Finder. You can also go under “Advanced Tools” to find a compression option. Saving and significantly reduce file size. Under Windows, if you open in Preview Mode, and click File->Save As… you’ll note that one of the options is “Reduced Size PDF”. The first, is to use Acrobat (not the free reader). There are a couple of ways to reduce PDFs. Bloated PDFs are also less likely to be found by standard WPO scans. While PDFs are not used to build web interfaces (despite Adobe’s hope back in the 1990s that the would replace it), many sites do use lots of downloadable PDFs. They are valuable in workflow because (1) the recipient doesn’t need a design tool to read them, just a free reader, and (2) their files are typically smaller than those produced by an authoring program like Adobe Illustrator. Introduced many years ago, they allow (print) documents to retain their formatting and (apparent) typefaces when delivered to people with non-designer workstations. One common format that hasn’t been well addressed is Portable Document Format, or PDF. However, there are other kinds of “rich media” besides images, audio and video that are often ignored in WPO. Since WordPress accounts for nearly 20% of all websites in 2015, plugins which shrink images are valuable: The one place where images weren’t well optimized is WordPress. To wring the very last bits out of images, check out the advanced tools in this review:įont compression has also become more important, as more sites use custom webfonts: While image compressors such as Smush-It are out there, newer versions of Creative Suite produce saved JPEGS and PNGs that are similar in size to the earlier compressors. Use WebP instead of JPEG for high-resolution bitmap images.Replace bitmap formats (JPEG, PNG) with vectors (outline fonts dingbats, SVG).Serve images adjusted to size of end user display.Combine images with CSS “sprites” using tools like Spritepad.Standard WPO includes compression of “rich media” as one of its schemes. Part of Sustainable Virtual Design includes compressing images and media for swifter delivery.
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