Niconico · ニコニコ動画

Live English subtitles for NicoVideo

So much of Niconico never gets subbed — MADs, commentary, live event archives, niche music. mimisubs listens to the Japanese audio as it plays and overlays an English translation on the video within a few seconds, no uploads or files required.

Get started — 30 min free See pricing

Works directly on the Niconico web player in Chrome.
Real-time: captions appear ~6 seconds behind the audio.
Great for un-subbed MADs, commentary tracks, and event archives.

Bonus: on this site we cache each translation, so the next person watching the same video gets the subtitles instantly — free for them, and it doesn't touch your monthly quota either.

How it works

1
Install the extension

One-click install from the Chrome Web Store. No setup.
2
Sign in

Enter your email for a one-time sign-in link, or use Sign in with Google.
3
Press play

Open the video, click the extension, hit Start English subtitles. Captions appear within seconds.

Common questions

Does it work on Niconico live (生放送)?

It works on any Niconico tab where audio is playing in your browser. Fast overlapping chat-style speech is harder to translate cleanly than a single narrator, but it still gives you the gist in real time.

Do I need a Niconico premium account?

No — mimisubs is independent of your Niconico account. You just need the video playing in a Chrome tab.

Also works on

mimisubs runs on any browser tab with audio — see how it works.