Okay - the best online dating sites that don’t require a credit card? Most, like Match, try to fool the daters by saying it’s free to sign up and search and communicate with someone - but that is only if someone who’s a paying member writes to you first. Unless you can sign up, create a profile and upload some pics and then search the members area (the free and paid members), the sites are just deceiving visitors - like e Harmony, which advertises its “free communication weekends.”A phrase intended to deceive, since you cannot communicate with anyone you want. Be advised that there are tons of pretenders - like Match and e Harmony and even virtually all the sites cited by others above and below who have responded to this question - don’t believe it.So be wary, especially since a large chunk of the dating sites and especially the sex-oriented sites are loaded with viruses and malware.On exploring some of the sites others on here are recommending, my anti-virus program prevented access, warning me that the sites were on a dangerous site blacklist.So a truly free site must allow a new user to set up a profile, search the database, let you know the last time the person was on the site (no point spending energy on someone who has not visited for a month or more) and allow you to both send and receive messages from other users.Of course, all online dating sites have added premium features to enhance your experience, to monetize the experience, but free has to include the critical elements of search and two-way communication.But the three that I can recommend, with varying degrees of enthusiasm are: OK Cupid -  I’d give this site 3 stars out of 5, mainly because it has fewer members than Po F and it’s not particularily programmable.
It’s by far the largest dating site on the planet, so there’s likely a good group of eligible singles to choose from, better than OK Cupid, from my experience.A negative to me is that Marcus, the founder from West Vancouver, has sold the site to the Match conglomerate, though he (or his bot) is still in evidence with notes on upgrading and the like.Mingle2 - [ ] would rate a 3 out of 5, since it does allow you to search and communicate with others online, but many have not filled in their profiles, suggesting they aren’t impressed and don’t really expect to find success on this site.In addition, Mingle2 has far fewer members to contact and seem to match members up with those of the opposite sex who are likely quite inappropriate.So you can try this, but keep those expectations low.