Portable Network Graphics

Writable

image

family of lossless compression bitmap image file formats

Identify it

Extensions	`.png`
MIME types	`image/png`
Signatures	`89504e470d0a1a0a` at byte 0 (File Formats Wiki)
PRONOM	`fmt/13fmt/12fmt/11`
Wikidata	`Q178051`
Library of Congress	`fdd000153`

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Open it

3DSlicerOpen sourcereads and writes · BSD licenses
AndroidOpen sourcereads and writes · Apache Software License 2.0 / GNU General Public License, version 2.0
AvogadroOpen sourcewrites · 3-clause BSD License
Bad PeggyOpen sourcereads and writes · GNU General Public License, version 3.0
Biosphere3DOpen sourcewrites · Mozilla Public License
Classic ColorsOpen sourcereads and writes · GNU General Public License, version 2.0
DearkOpen sourcewrites · MIT License
DendroscopeOpen sourcewrites · GNU General Public License, version 3.0
DevILOpen sourcereads and writes · GNU Lesser General Public License, version 2.1
digiKamOpen sourcereads and writes · GNU General Public License, version 2.0 or later
djxlOpen sourcewrites · 3-clause BSD License
farbfeldOpen sourcereads and writes · ISC license
GD Graphics LibraryOpen sourcewrites · BSD licenses
GDALOpen sourcereads and writes · MIT License
GephiOpen sourcewrites · GNU General Public License
GigaMeshOpen sourcewrites · GNU General Public License
GIMPOpen sourcereads and writes · GNU General Public License, version 3.0
GNU Dr. GeoOpen sourcewrites · GNU General Public License, version 2.0 or later
ImageMagickOpen sourcereads and writes · ImageMagick License
Integrated Genome BrowserOpen sourcewrites · Common Public License
KarbonOpen sourcewrites · GNU Lesser General Public License
KmPlotOpen sourcewrites · GNU General Public License, version 2.0 or later
Kreative Structured Format LibraryOpen sourcereads and writes · Mozilla Public License
KritaOpen sourcereads and writes · GNU General Public License, version 3.0
libexiv2Open sourcereads and writes · GNU General Public License, version 2.0 or later
libpngOpen sourcereads and writes · Libpng License
LibreOffice DrawOpen sourcereads and writes · Mozilla Public License, version 2.0
librsvgOpen sourcewrites · GNU General Public License / GNU General Public License, version 2.0 / GNU Lesser General Public License / GNU Library General Public License, version 2.0
LodePNGOpen sourcereads and writes · zlib License
MatplotlibOpen sourcewrites · Matplotlib license
MscGenOpen sourcewrites · GNU General Public License
NtEdOpen sourcewrites · GNU General Public License, version 2.0 or later
OpenJUMPOpen sourcereads and writes · GNU General Public License, version 2.0
OrthancOpen sourcewrites · GNU General Public License, version 3.0
Overpass TurboOpen sourcewrites · MIT License
PDFCreatorOpen sourcereads and writes · GNU General Public License, version 3.0
PhpThumbOpen sourcereads and writes · GNU General Public License
PIPE2Open sourcewrites · MIT License
PiskelOpen sourcereads and writes · Apache Software License 2.0
PLplotOpen sourcewrites · GNU Library General Public License, version 2.0 or later

And 302 more in the JSON record.

Convert it

To	With	Fidelity	Command and losses
Tagged Image File Format	ImageMagick	Lossless	`convert in.png out.tif` Pixels kept; some metadata, colour profiles or layers may be dropped.
GIF 89a	ImageMagick	Lossy	`convert in.png out.gif` Reduced to 256 colours.
JPEG File Interchange Format 1.02	ImageMagick	Lossy	`convert in.png out.jpg` Lossy compression.
WebP	ImageMagick	Lossy	`convert in.png out.webp` Lossy compression.

Documentation

kaitai grammar: https://github.com/kaitai-io/kaitai_struct_formats/blob/master/image/png.ksy

Versions and variants (3)

Portable Network Graphics 1.0Partly documented
Portable Network Graphics 1.1Partly documented
Portable Network Graphics 1.2Partly documented

Sources

From Converters (FFmpeg, ImageMagick, Pandoc, LibreOffice), Just Solve the File Format Problem (File Formats Wiki), Kaitai Struct format gallery, Wikidata. Updated 2026-10-24.

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