While I didn't never specifically optimize it for the size (unlike some libraries I do), my very old qr.js library [1] seems to be smaller than that, less than

While I didn't never specifically optimize it for the size (unlike some libraries I do), my very old qr.js library [1] seems to be smaller than that, less than 9 KB minified and 4 KB gzipped in my brief testing. I should note that qr.js never supported the correct Kanji encoding and optimal encoding based on dynamic programming, but otherwise it is functionally complete and I think it can't get much larger than that. There are lots of rooms to cut from there and I will say 5 KB is a fair estimate for the minified size after modest but correctly guided size optimization. [1] https://github.com/lifthrasiir/qr.js https://github.com/lifthrasiir/qr.js (predates the modern JS, but surely more popular than LeanQR I believe)