zopfli-pnginator

Quick utility to embbed javascript code in a (compressed) PNG image. Adds a custom chunk to the PNG that contains a tiny "html/js unpacking" script. Image data (input javascript source) will be compressed via zopfli (default) or standard deflate. Opening the PNG with file extension .html in a browser will unpack the image contents and execute the javascript.

Compile with gcc or clang: gcc -lz -lzopfli -std=c17 -Wall -Wextra -pedantic zopfli-pnginator.c

Based on:

• daeken
• gasman

Uses:

• https://github.com/google/zopfli
• https://github.com/madler/zlib

Notes:

• Superseded by https://github.com/mgnauck/js-payload-compress