Portable Network Graphics
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Main Page > Documentation > Format policies > Portable Network Graphics
Also known as
File extension(s)
.png
Format registry information
Significant characteristics
See Significant characteristics of raster images
Preservation action plan
See Raster images
Preservation issues
- 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
Conversion test results
PNGs will not be normalized so no normalization testing has been undertaken.
More information
Library of Congress Sustainability of Digital Formats: PNG, Portable Network Graphics