[gewa]

Im not sure if it's legally flawless to upload the published journal article to your Website and open it up to the public. As far as i know, you're only allowed to pass it on a personal, per-request basis. This explicitly refers to the final peer reviewed article and not to the manuscript, which can make a great difference.

[prepend]

It’s granted individually on a personal, per http request.

[Thrymr]

Many publishers explicitly allow you to post your own articles on your personal/professional website. Some only allow "preprint" form and not the published version.

[semi-extrinsic]

Most journals explicitly allow preprints or postprints (the final article, but without the layout of the publisher) to be posted on personal webpages.