Chatroom Font Size Customizer

by tokihorokeiya · Tools

Manifest V3 Free

View in Chrome Web Store Data as of 21 Oct 2026

Adjust font size for YouTube Live popout chat and Twitch popout chat dynamically with no login required.

Users

+8 in 30 days

Rating

5.0 / 5

unchanged in 30 days

Ratings

0 in 30 days

Store rank

#194K

#162K among extensions

Version

1.0.1

updated 6 Oct 2026

Users

monthly, 1 months

Latest, 21 Oct 2026: 11 usersMove the mouse over the chart for any month

Ratings count

monthly, 1 months

Latest, 21 Oct 2026: 1 ratingsMove the mouse over the chart for any month

The Chrome Web Store rounds user counts down to the leading digit, so the user line moves in steps. The ratings count is exact and is the better signal of real adoption.

About Chatroom Font Size Customizer

Easily adjust and customize the font size in YouTube Live popout chats and Twitch chat windows from 10px up to 64px! Perfect for streamers, multi-monitor setups, VTubers, or anyone who finds default stream chat fonts too small to read from a distance.