Chrono – Finish Time & Speed for YouTube by CPT Dawn

Chrono shows how long a video really takes at your speed, and the moment you'll finish, right at the top of YouTube's sidebar.

A 40-minute lecture at 1.5× is 26 minutes 40. Chrono does that math for every video, chapter and playlist, keeps it live as you change speed, and turns it into a clock time: "Ends 3:45 PM".

What you get
• Finish time at a glance: the watch time left at your speed and when you'll be done, with speed − and + beside them.
• Every speed side by side: remaining and finish time from 0.25× to 4×. Click a row to switch.
• Chapters and playlists: the time left in the chapter you're in, or up to any entry in a playlist.
• Targets: have 45 minutes, or need to be done by 6 PM? Chrono works out the speed you need and applies it in one click.
• Past 2×: the player stops at 2×. Chrono's + keeps going in 0.25× steps up to 4×, and every estimate follows.
• Player badge: an optional "/ ends 3:45 PM" after the player's own time, in fullscreen too.
• Playlist totals: one line on playlist pages with the total length, the watch time at your speed, and how many entries are unavailable.

Made to fit in
• Looks like part of the page: same type, same shapes, light and dark theme, theater and fullscreen.
• Chrono's speed is the player's speed. Change it in either place.
• Pauses its estimates during ad breaks, and stays out of the way on live streams.
• Works in background tabs and as you move from video to video.
• Keyboard and screen-reader friendly, and respects reduced motion.
• 12- or 24-hour clock, or automatic.

Private by design
No analytics, no tracking, no account. Chrono's only permission is storage for your settings, and it runs only on www.youtube.com. It's open source under the MIT licence: https://github.com/CPT-Dawn/Chrono

Chrono is not affiliated with or endorsed by YouTube or Google.