JPX

Readable

image · also known as JPF

JPX is an image file format extended from JP2, providing the potential for extended colour space support, alternative compression methods, and other features. JPX may be used in applications that require additional functionality or data structures beyond those defined in the JP2 file format.

Identify it

Extensions	`.jpf.jpx`
MIME types	`image/jpx`
Signatures	`0000000c6a5020200d0a870a` at byte 0 (JPEG 2000 with Extensions)
PRONOM	`fmt/151`
Wikidata	`Q27979400`
Library of Congress	`fdd000154`

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Open it

ImageMagickOpen sourcereads and writes · ImageMagick License
OpenJPEGOpen sourcewrites · 2-clause BSD License
ExifToolOpen sourcereads · Artistic License / GNU General Public License, version 1.0 or later
ConverseenOpen sourcereads · GNU General Public License, version 3.0
nomacsOpen sourcereads · GNU General Public License, version 3.0
OpenImageIOOpen sourcereads · BSD licenses
PaintShop Photo Pro X3reads and writes
Q207902writes · proprietary license
Adobe Photoshop Elements 3.0reads and writes
Grokreads and writes
IrfanViewreads and writes · freeware
Q1936840writes
Q650922writes · freeware / proprietary license
ENVIreads · proprietary license
MediaRich Serverreads
PaintShop Pro X4reads
ACDSeereads · proprietary license
Advanced Guard for Information Securityreads
Affinity Photoreads
ArcGISreads · proprietary license
Pinnacle Studio 17 Ultimatereads
Quick Lookreads

Convert it

To	With	Fidelity	Command and losses
Portable Network Graphics	ImageMagick	Lossless	`convert in.j2c out.png` Pixels kept; some metadata, colour profiles or layers may be dropped.
Tagged Image File Format	ImageMagick	Lossless	`convert in.j2c out.tif` Pixels kept; some metadata, colour profiles or layers may be dropped.
GIF 89a	ImageMagick	Lossy	`convert in.j2c out.gif` Reduced to 256 colours.
JPEG File Interchange Format 1.02	ImageMagick	Lossy	`convert in.j2c out.jpg` Lossy compression.
WebP	ImageMagick	Lossy	`convert in.j2c out.webp` Lossy compression.

Sources

From Just Solve the File Format Problem (File Formats Wiki), PRONOM, Wikidata. Updated 2026-10-24.

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