FlashCaption

Real-time captions and live translation for any video or livestream, right inside Firefox.

Ever watched a stream, a match, or a video in a language you don't speak and missed half of it? FlashCaption listens to whatever is playing in your tab and puts AI subtitles on screen as people speak, translated into the language you actually read. Whatever the language, you stay in sync.

Start with a 7-day free trial. Full access from minute one, and you can cancel any time before it ends. Turn it on and captions appear live. No setup, no uploads, no switching tabs.

WHERE IT WORKS

• YouTube, including live streams and Shorts • Twitch and other live streaming sites • Anime and drama sites, bilibili, and Korean streams on Naver Chzzk • Foreign sports streams and news channels • Webinars, online courses, and browser-based meetings • Most other video players on the web

REAL-TIME CAPTIONS AND TRANSLATION

• Live captions generated as people speak, not uploaded files or pre-made subtitle tracks • Those subtitles translated instantly into your preferred language, including Korean, Japanese, Chinese, Spanish, Russian, and Portuguese • Follow foreign streamers, anime, K-content, and international sport, and catch every word • Keep up with fast speech and multilingual chat without pausing or rewinding

FAST, PRIVATE, AND BUILT FOR LIVE

• Low-latency captions that keep pace with live audio • Privacy-first: your audio is processed live and never stored • Runs in the browser, no desktop app and no complicated setup • Nothing to upload and no files to convert

FLEXIBLE AND CUSTOMIZABLE

• Overlay subtitles directly on any video • Adjust font size, color, and position • Switch languages at any time • One-click toggle on or off

SIMPLE PLANS, 7 DAYS FREE

• Try any plan free for 7 days, secure checkout by Stripe • Weekly from $1.99, monthly and yearly available • Cancel any time before the trial ends

WHO IT IS FOR

Stream watchers who follow creators in another language, anime and K-drama fans, language learners, sports fans on foreign feeds, students in online lectures, and anyone sitting in a meeting or webinar that is not in their first language.

Home: https://flashcaption.com Questions or feedback: https://flashcaption.com/contact