It's been some time since I've played with this stuff, but the libs I used were https://github.com/oraoto/pib https://github.com/oraoto/pib for in-browser PHP,

It's been some time since I've played with this stuff, but the libs I used were https://github.com/oraoto/pib https://github.com/oraoto/pib for in-browser PHP, Pyodide for in-browser Python, and https://webperl.zero-g.net https://webperl.zero-g.net for in-browser Perl.