woltapp/blurhash ? reverse-engineered prompt

Build me a BlurHash library and demo site that lets an image turn into a short text string, then turn that string back into a blurry placeholder while the real image loads.

I want the core algorithm implemented cleanly, with a simple encoder and decoder, plus small examples showing how to use it in C, Swift, Kotlin, TypeScript, and Python. The website should explain what BlurHash is, show a few before and after examples, and let me paste in an image to generate a BlurHash and preview the placeholder. Keep it lightweight and easy to read, since the goal is portability and not a huge framework. If you need to check current best practices or docs for any platform, look them up online.