https://seositecheckup.com/tools/javascript-minification-test
JavaScript Minification Test | SEO Site Checkup
Trim 30 to 50 percent off your script payload by checking that external JavaScript ships minified, with whitespace, comments, and long identifiers stripped out.
javascriptminificationtestseosite
https://seositecheckup.com/tools/css-minification-test
CSS Minification Test | SEO Site Checkup
Trim bytes off the critical rendering path by checking that your external stylesheets ship minified with whitespace, comments, and unused characters removed.
cssminificationtestseosite