If you require a web based client that allows you to just put in a nickname and connect, you can use KiwiIRC.
Registered Users (Recommended for everyone with a registered nick account)
1. Enter your NickServ user account name (usually your primary nickname) 2. Check the "I have a password" box 3. Enter your password 4. Click Start.
1. Enter desired nickname 2. Click Start
You can add additional channels like this in the URL:
Registered: https://kiwiirc.com/nextclient/auth.cuff-link.me/#cuff-link,#example1,#example2 Unregistered: https://kiwiirc.com/nextclient/irc.cuff-link.me/#cuff-link,#example1,#example2
These URLs can be bookmarked, so all you’ll have to do is enter a nickname and, if you are registered, your password after loading your custom bookmark.