Standard: Graphic Formats and File Size
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Definitions
A graphic is an image, including photos, logos, banners, icons, maps, charts (including bar charts, pie charts, flow charts and organizational charts), graphs and other images.
Content requirements
File Formats
- Use only the GIF (.gif), JPEG (jpg) or PNG (.png) format for graphics.
- PNG transparency needs work around on IE 6 and under.
File Size
- Optimize web images. Reduce file size as much as possible while retaining acceptable visual quality.
- Do not use large images and reduce their size using HTML. These images slow download.
- Include the actual dimensions of images in HTML code.
Examples
Do not take a high resolution 1000 x 1000 image and change the HTML code so that it appears as if it is only 250 x 250
Full Metadata about this standard
Name Graphic Formats and File Size
Tracking number NT00000000
Type Standard
Required or Recommended Required
Effective date 09/28/2005
Date approved 07/01/2013
Category File Formats, Graphics and Multimedia
Web Council review by 07/01/2013 (or earlier if deemed necessary by the Web Council)
Governing Policy Web Governance and Management (PDF) (4 pp, 339K, About PDF)