I thought it would be fun to list some in-browser music websites, when we want to fiddle something at home.
Here are some:
Bookmarked - thanks!
Great thread idea. I’m actually working on a browser-based minimalist generative sequencer at the moment. It’s not much currently, but I have a list of features I’d like to implement, like webmidi etc.
Work in progress version here if anyone wants to have a play:
https://editor.p5js.org/pselodux/sketches/kMQoGZduT
I’ll be keeping that page updated as I work on it.
this one is fun: http://typedrummer.com
and this by the same dude: http://scribble.audio
here’s a whole bunch: https://synth.playtronica.com
WAM Synths are worth a mention. They have browser versions of OBXD, DEXED, TAL-NoiseMaker, and a CZ-101.
Wow, this looks amazing!
Here’s a new one 
Have not played myself but looks interesting and I’ll give it a go soon.
There is nothing you can do to the drum sounds. Zero configuration besides 8 steps, tempo and a random fill. The 303 you have 6 possible notes, cut - res - env. You can record too.
And who cares! It sounds really good and is just fun to play. Whatever you put in sounds rad. Bluetooth to the big speakers in the living room and jam out different patterns.
This one reminds me of GarageBand’s drum sequencer a lot. Easy to play with.
Used to be called Hobnox now it’s just
https://www.audiotool.com/
This website makes me smile 
and I’ve only explored a few of the modules. Thanks for sharing!
was kinda my main DAW from 2009 - 2013 and gained quite a followership there. fits a boring office job perfectly well 
here‘s a track of mine only using synths and their 808 clone:
should dive back in there sometimes because they added a nice mastering suite and a couple of funky reverbs.