Black tie

No most people will list as Black Tie or Formal and will also post it on their wedding website.

We have it on our website
ALSao
It’s on our invitation bottom far RIGHT at the corner I’m BOLD to be easily read !

I believe black tie affairs are the one exception to it being ok to list attire on invites.
Just as long as you're having a true black tie wedding with all the bits that are involved.

As long as you're having an actual black tie event I've seen them listed at the bottom of the invites.

Black Tie is the only attire that's acceptable to put on an invite because it doesn't refer to attire specifically, but more the entire wedding itself so the guest knows what to expect (valet, live band, top shelf open bar, multi course plated meal, coat check, favors, seating chart, ushers, etc.). I would just do a small website since they are free and easy to set up. I would expect one for a black tie wedding.

Agreed with PPs. Are you planning on hosting a black tie wedding? (Valet parking, top shelf bar, multi-course plated meal, etc.)

If you don't want it on your invite and you are not doing a wedding website you can include an information card in the invite. I am doing this for my elderly guests who don't go online. It has information about the food being served, dress code, local hotels, contact info, etc.

Traditionally, the only time the manner of dress is put on an invitation is when it is black tie, or white tie. And the in not only indicates formality of dress, but the level of service you are providing. So put it on the invitation, usually bottom right. Some of the older stationery companies like Eating that are not discount and informal invitations only, have examples showing proper notation, on their website.