[Comevius]

You can have a sponsor button on GitHub.

Or you can figure out a way to monetize it as a managed service. I would make a browser extension and charge for storage. It wouldn't cost much to run it, though the egress fees can potentially sabotage your profit. Also anyone can copy your business with just a few lines of code in Cloudflare Workers, so you would have to rely on branding and word of mouth.