How do you market yourself as a freelance web developer (working on some freelance platform or on your own)? Do those work?

Pick one or two channels to focus on, and then set aside dedicated time each week for working on them. Don’t stop working them when you have jobs.

A channel, can be the people you meet working in a shared office space, freelance sites, meetups, cold calling.

Each channel works differently, so advice differs a bit depending on which you use.

Platforms like fiverr can work, but the cut they take can be quite a lot. So other channels are definitely better, for you, and for your clients.