PEF to JBIG Converter

Free PEF to JBIG converter — process images online

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Safe Conversion

Your data stays protected — PEF files are erased as soon as conversion finishes, and any JBIG output is permanently removed within 24 hours.

Simple Interface

The conversion interface is clean and intuitive — just three steps from PEF upload to JBIG download. No learning curve, no complicated menus.

All Platforms

Convert PEF to JBIG from any device — Windows, macOS, Linux, or mobile. All you need is a browser and an internet connection.

How to convert PEF to JBIG

1

Select files from Computer, Google Drive, Dropbox, URL or by dragging it on the page.

2

Choose jbig or any other format you need as a result (more than 200 formats supported)

3

Let the file convert and you can download your jbig file right afterwards

About formats

PEF (Pentax Electronic Format) is the proprietary RAW image format used by Pentax digital SLR and mirrorless cameras, introduced in 2003 with the *ist D — Pentax's first digital SLR — and continuing through the current K-mount and medium-format 645 lineup. PEF files capture the unprocessed 12-bit or 14-bit readout from the camera's CMOS sensor in its native Bayer mosaic pattern, stored in a TIFF-based container with Huffman-coded lossless compression. The format includes embedded JPEG previews at multiple sizes, comprehensive EXIF metadata, and Pentax-specific MakerNote tags that record Custom Image mode settings, Shake Reduction (SR) gyroscope data, lens identification from the K-mount electronic interface, and the camera's Auto Level correction parameters. Pentax cameras are notable for their weather-sealed construction and compatibility with the vast legacy of K-mount lenses dating back to 1975, and PEF files from these bodies can include manual lens metadata entered through the camera's menu system. One advantage is the preservation of Pentax's distinctive color rendering — the brand's Custom Image modes (Bright, Natural, Reversal Film, Bleach Bypass, etc.) are stored as metadata rather than applied to the raw data, allowing photographers to explore different rendering interpretations during post-processing while the original sensor capture remains untouched. The format's longevity is another strength: PEF files from every Pentax DSLR are supported by Adobe Lightroom, Capture One, dcraw, RawTherapee, Pentax's own Digital Camera Utility, and other modern RAW processors.
Developer: Pentax
Initial release: 2003
JBIG (Joint Bi-level Image experts Group) is a lossless image compression standard (ITU-T T.82) published in 1993, developed by a committee of experts drawn from the same international standards bodies that created JPEG. While the extension .jbig and .jbg refer to the same underlying compression standard, .jbig is the more explicit form commonly used in software that handles the raw JBIG-compressed datastream. The compression algorithm centers on context-dependent arithmetic coding: before encoding each pixel, the encoder examines a configurable template of 10 to 16 nearby pixels (a mix of neighbors from the current and previous lines) to determine a context — one of thousands of possible local pixel configurations. Each context maintains its own adaptive probability estimate that is continually updated as encoding proceeds, allowing the coder to exploit the statistical patterns unique to each image region. This approach handles text, line art, halftoned photographs, and mixed-content pages with a single algorithm, achieving consistently better compression than the fixed Huffman tables of Group 3 or the simpler prediction model of Group 4. A later revision, JBIG2 (T.88), added pattern matching and lossy modes for even higher compression, but the original JBIG remains widely deployed. One advantage is the algorithm's adaptiveness: unlike Group 3/4 codecs that use fixed statistical models, JBIG continuously learns the characteristics of each specific image as it encodes, providing near-optimal compression across widely varying content types. The standard is embedded in many multifunction printers and document scanners for internal image handling. JBIG files are processable by ImageMagick, jbigkit, and enterprise document imaging systems.
Initial release: 1993

Frequently Asked Questions

What are the reasons to convert PEF to JBIG?

PEF files from Pentax DSLRs store rich tonal data that requires specialized tools — converting to JBIG makes them accessible on any device or platform.

How do I open a JBIG file?

JBIG files can be opened with IrfanView, XnView, JBIG-Kit tools, and document imaging software.

How fast is the PEF to JBIG conversion?

Conversion typically takes just a few seconds — PEF images are processed on powerful servers and the JBIG output is ready almost immediately.

Is PEF to JBIG conversion free?

The converter is free for everyday use. Convertio offers premium plans when you need extended limits or priority processing for PEF to JBIG.

Does the converter work on all devices?

It works everywhere — any modern web browser on desktop or mobile can handle PEF to JBIG conversion through Convertio without installing anything.