WebP Extended

Readable

image

WebP is a raster image format developed by Google that uses the Resource Interchange File Format as a container. The extended version of the format allows for alternative colour profiles and animation.

Identify it

Extensions	`.webp`
MIME types	`image/webp`
Signatures	`52494646` at byte 0 (WebP Extended)
PRONOM	`fmt/568`
Wikidata	`Q45989477`

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Open it

GD Graphics LibraryOpen sourcewrites · BSD licenses
Q108353872Open sourcereads and writes · GNU General Public License, version 3.0
Q141647655Open sourcereads and writes · Apache Software License 2.0 / MIT License
Q141647660Open sourcereads and writes · Apache Software License 2.0 / MIT License
Q141647662Open sourcewrites · Apache Software License 2.0 / MIT License
Q1047199Open sourcereads · ImageMagick License
AbydosOpen sourcereads · GNU Lesser General Public License
ConverseenOpen sourcereads · GNU General Public License, version 3.0
GodotOpen sourcereads · MIT License
imageioOpen sourcereads · 2-clause BSD License
MapLibre GL JSOpen sourcereads · 3-clause BSD License
Mozilla FirefoxOpen sourcereads · Mozilla Public License, version 2.0
PhotoRecOpen sourcereads · GNU General Public License
PixiEditorOpen sourcereads · GNU Lesser General Public License, version 3.0
Q130252332Open sourcereads · Apache Software License 2.0 / Creative Commons Attribution 4.0 International / MIT License
TesseractOpen sourcereads · Apache Software License 2.0
ThorVGOpen sourcereads · MIT License
ZenphotoOpen sourcereads · GNU General Public License, version 2.0
Adobe Photoshop Elementsreads and writes
Asepritewrites · proprietary license
Clip Studio Paintwrites · proprietary license
PaintShop Pro X4reads and writes
Photopeareads and writes
PicPickreads and writes
Q1936840reads and writes
PhotoLinereads
Picasareads · freeware
Pixelmator Classicreads · proprietary license
Affinity Photoreads
Mapbox GL JSreads · proprietary license
PaintShop Pro X6 Ultimatereads
PDF Gurureads
Q472277reads · freeware
SlideScopereads · proprietary license

Convert it

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

Documentation

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

Sources

From Kaitai Struct format gallery, PRONOM, Wikidata. Updated 2026-10-24.

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