Portable Network Graphics
Sign in to savePortable Network Graphics (PNG, officially pronounced , colloquially pronounced ) is a raster-graphics file format that supports lossless data compression. PNG was developed as an improved, non-patented replacement for Graphics Interchange Format (GIF).
AI overview
Portable Network Graphics (PNG) is a file format for saving digital images that compresses the image data without losing any quality. It was created as a better, freely-available alternative to the older GIF format.
AI-generated from the Wikipedia summary — may contain errors.
Key facts
- File format.name
- Portable Network Graphics
- File format.screenshot
- 280px
- File format.caption
- A PNG image of four differently colored dice with an 8-bit transparency channel, overlaid onto a checkered background, typically used in graphics software to indicate transparency
- File format.uniform type
- public.png
- File format.conforms to
- public.image
- File format.genre
- Lossless bitmap image format
- File format.owner
- PNG Development Group (donated to W3C)
- File format.latest_release_version
- 3.0
- File format.extendedto
- APNG, JNG, and MNG
- File format.standard
- ISO/IEC 15948, IETF RFC 2083
- File format.open
- Yes Zlib/libpng license
Article
43 sectionsContents
- History and development
- PNG Working Group
- File format
- File header
- "Chunks" within the file
- Critical chunks
- Ancillary chunks
- Pixel format
- Transparency of image
- Compression
- Filtering
- Interlacing
- Animation
- Examples
- Advantages
- Comparison with other file formats
- Graphics Interchange Format (GIF)
- JPEG
- JPEG-LS
- JPEG XL
- TIFF
- WebP
- AVIF
- Software support
- Bitmap graphics editor support for PNG
- Web browser support for PNG
- Operating system support for PNG icons
- File size and optimization software
- Compared to GIF
- File size factors
- Lossy PNG compression
- Image editing software
- Optimizing tools
- Tool list
- Ancillary chunk removal
- Filter optimization
- DEFLATE optimization
- Icon optimization
- See also
- Explanatory notes
- References
- Further reading
- External links
Portable Network Graphics (PNG, officially pronounced , colloquially pronounced ) is a raster-graphics file format that supports lossless data compression. PNG was developed as an improved, non-patented replacement for Graphics Interchange Format (GIF).
PNG supports palette-based images (with palettes of 24-bit RGB or 32-bit RGBA colors), grayscale images (with or without an alpha channel for transparency), and full-color non-palette-based RGB or RGBA images. The PNG working group designed the format for transferring images on the Internet, not for professional-quality print graphics; therefore, non-RGB color spaces such as CMYK are not supported. A PNG file contains a single image in an extensible structure of chunks, encoding the basic pixels and other information such as textual comments and integrity checks documented in RFC 2083.