Scrolls YouTube timestamped comments and chat replays across the video, Niconico-style. Supports live streams and premieres.
Users
398
+74 in 30 days
Rating
4.8 / 5
unchanged in 30 days
Ratings
4
0 in 30 days
Store rank
#48K
#40K among extensions
Version
1.6.0
updated 16 Sep 2026
Users
monthly, 7 months
Latest, 15 Oct 2026:398 usersMove the mouse over the chart for any month
Ratings count
monthly, 7 months
Latest, 15 Oct 2026:4 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 NicoFlow - Niconico-style scrolling comments for YouTube
NicoFlow scrolls YouTube comments across the video, Niconico-style (danmaku / bullet comments).
【✨ Features】
・Scrolls timestamped comments (e.g. "2:30 lol") over the video at the right moment
・Real-time chat on live streams and premieres
・Chat replay on archived live streams and premieres
・Comment density graph on the seek bar (see where the highlights are at a glance)
・Adjustable speed, font size and opacity
・Choose where comments scroll (full / top half / bottom half)
・Choose the comment font (Japanese / System) 🆕
・English UI (switches automatically based on your browser language) 🆕
【🎬 Supported videos】
・Regular videos (timestamped comments)
・Live streams (real-time chat)
・Archived live streams (chat replay)
・Premieres while airing (real-time chat)
・Archived premieres (chat replay)
【📖 How to use】
1. Open any YouTube watch page and NicoFlow starts automatically
2. Use the bar below the video to switch between Comments / Chat mode and open the settings (⚙)
⚠️ Changes on YouTube's side may temporarily break the extension.
【📋 Changelog】
▶ v1.6.0
・Added English UI (shown automatically when your browser language is not Japanese)
・Added a comment font setting (Japanese / System). "System" is recommended if most comments are in English, Cyrillic, etc.
・Improved lane selection so that faster (longer) comments no longer catch up and overlap earlier ones, especially on busy live streams and premieres
・Comments no longer fire all at once and overlap after returning from a background tab
▶ v1.5.0 - v1.5.3
・Redesigned comment outlines (no more dark halo; blends naturally with the video)
・Added a scroll area setting (full / top half / bottom half; top half avoids overlapping subtitles)
・Comments at popular moments are spread out instead of stacking on top of each other
・Fixed comments freezing after a long pause
▶ v1.4.5 - v1.4.6
・Fixed chat freezing on the right edge right after opening a live stream
・Adapted to YouTube's seek bar changes
▶ v1.4.0
・Added a comment density graph on the seek bar
・Added an inline settings panel below the video (⚙: size, speed, opacity, colors)
・Chat replay now loads completely without freezing
・Scroll speed adapts to the video width on vertical and square videos
・Comments hide automatically when the video ends
・Fixed the live archive chat panel being closed unexpectedly
▶ v1.3.0
・Comments follow the playback speed (fast / slow)
・Comments scale with the video when switching to fullscreen or theater mode
▶ v1.2.0
・Improved spreading of live chat comments