Portable Network Graphics

Main Page > Documentation > Format-specific preservation plans > Portable Network Graphics

File extension(s)

• .png

Format registry information

• PRONOM

Significant properties

See Significant properties of raster images

Preservation action plan

• Do not normalize.

Preservation issues

• Xena retains .png files as is and wraps them in Xena XML.
• Suggested preferred preservation format for bitmap images, Library of Congress
• Florida digital Archive has "high confidence level" in ability to preserve .png files: FDA Recommended Data File Formats.
• Library and Archives Canada considers PNG to be a recommended format for still images: Guidelines for Computer File Types, Interchange Formats and Information Standards

More information

• Library of Congress Sustainability of Digital Formats: PNG, Portable Network Graphics