The Swiss Federal government has revoked almost all Covid related regulations as of Thursday February 17th. Entry into Switzerland is back to normal for many nationalities.
Entry requirements for EU citizens and residents: Neither the entry form nor a negative test nor a vaccination certificate are required.
Entry requirements for non-EU citizens: from many countries (eg the UK and USA) you still need a double vaccination certificate.
To check use the tool on the interactive official Swiss Travelcheck website which will inform you what requirements you need to fulfil in order to enter Switzerland, based on your individual data.
Once in Switzerland, you no longer need a certificate to enter restaurants, bars and clubs. Nor do you need to wear a mask in shops and other public places. The only requirement is that you need to wear a mask in public transport such a trains, buses and enclosed mountain lifts.