Can relate. I built a little web utility back in 2009. Did practically nothing with it (occasional updates every 2/3 years) and it slowly accumulated inbound links and google ranking. Then finally in 2019 I decided to put a bit more effort into it. Now I make my living from it! :-)
Yeah, it's all client side. Which is why I was able to just leave and forget about it for so long. Was hosted on an S3 bucket. There's tons of libraries out there that does client side compression/decompression. Just search through github! :-)
