The Better than PNG Image Format for
Fast, Lossless Compression

BNG is fast. And small! It losslessly compresses images to be 13.3% smaller than PNG, while offering 17x faster encoding and 1.3x faster decoding.

BNG is simple. The reference encoder and decoder together are 469 lines of C. The file format specification is one plain text file.

• File format specification
• Reference encoder and decoder in C
• Optimized encoder and decoder in C
• Implementation in Brevis, as it runs on Serēnum
• Benchmark results on 1797 different images
• All of the above as a ZIP

The BNG logo (black version), the specification and the implementations are free to use.

Sam H. Smith – serenum.computer
Made in Sweden <3