Best Practice 4.14.4.6. Preferred Image Formats.
The best formats for images, in order, are:
- SVG
- Vector graphics format ideal for HTML output formats. Scalable and compact. Converts to other formats, such as PDF.
- Vector graphics format ideal for print and PDF output formats. Good tools exist to convert back-and-forth between SVG and PDF.
- PNG
- Lossless and compressible format for raster images. May be used for both HTML and PDF outputs.
- JPEG
- Compressed lossy format which works well for photographs. May be used for both HTML and PDF outputs. PNG should be preferred when there is a choice, except in the case of a photograph. Converting between these formats is unlikely to be an improvement.
