I like postman and, generally speaking, it is pretty lightweight. I don’t think you can do much better. I do not like the organization of projects and save queries, but I don’t think it’s a deal breaker.
You could always fall back to command line and Python. There are Python modules that make it super easy.
I believe there are a few online ones you might want to try, but my stuff at work is behind a firewall so I can’t use them - and it would be frowned upon by our security and IP people.