...and if browserless ain't your jam, checkout https://www.prerender.cloud/
cheap, because we optimized for just 3 things:
pre-rendering, screenshots, or PDFs for $0.000365 per API request
curl https://service.prerender.cloud/screenshot/https://google.com/ > out.jpg
curl https://service.prerender.cloud/pdf/https://google.com/ > out.pdf
curl https://service.prerender.cloud/https://google.com/ > out.html