PDF is well-known, and [effectively] universal It's also "fixed" - ie, probably as close to a WYSIWYG format as has ever been created (so far) HTML5 is ice ..

PDF is well-known, and [effectively] universal It's also "fixed" - ie, probably as close to a WYSIWYG format as has ever been created (so far) HTML5 is ice ... but it's not a 1-for-1 replacement/equivalent