BPG

File Format
Name	BPG
Ontology	Electronic File Formats Graphics BPG
Extension(s)	.bpg
PRONOM	fmt/687
Released	2014

BPG (Better Portable Graphics) is a compressed raster graphic format, using HEVC to encode pictures. Animation, deep color, and metadata are supported. The format is experimental and not natively supported by browsers; a Javascript loader is available that converts BPG to PNG for display. The bitstream format is very similar to raw HEVC.

image/bpg has been suggested for the MIME type, but none is formally registered.

Identification

BPG files start with the following 4-byte magic pattern: 42 50 47 fb.

Specs

• BPG Specification

See Also

• HEIF
• AVIF

Software

• Tom's Editor
• libbpg
• ImageMagick

Sample files

• Comparison with JPEG (actual BPG files: lena_q36.bpg, lena_q32.bpg, lena_q28.bpg, lena_q23.bpg)
• Wikipedia pictures (actual BPG files: 003.bpg,005.bpg)
• Images with alpha channel (actual BPG files: 2.bpg,2small.bpg, 3.bpg, 5.bpg)
• dexvert samples — image/bpg

Links

• Official format specification
• Official site
• Wikipedia article
• BPG, a still-image format from video compression
• Some discussion
• Identification of BPG format
• Online demonstrator- shows quality differences between similarly-sized images in JPEG, JP2, WebP and BPG formats
• Unofficial Github mirror