> I'm always a bit wary of approaching these ideas though because I feel like nobody would ever pay for small web stuff?

Build them and find out! There's almost always room for something better, and if what you build is that, then some people will pay.

Unless the tools have large running costs, consider offering them for free (at least at first).

A few things are likely to happen:

Nobody cares enough to sign up – fine, zero users, zero costs.

People use it but don’t stick around – ask them what would make the tool more valuable.

People use it a lot – great, now you can charge for the value.

Two examples come to mind: spaced repetition app Mochi and markdown editor Typora. Mochi is $5 a month, I think. Typora was free and is now a $15 one-time purchase.

Both compete with free alternatives and still have many paying users.