ルンルンKARAOKE by Thomas
Turn YouTube videos into bilingual karaoke. Find lyrics, add translations, and adjust timing to sing along with your favorite performances.
Extension Metadata
About this extension
ルンルンKARAOKE adds synchronized bilingual lyrics to YouTube videos. Display original lyrics with a translation underneath, and adjust the
timing to match the performance you are watching.
Features:
• Search LRCLIB for lyrics, import LRC files, or paste your own lyrics.
• Display Japanese kanji and kana alongside translations.
• Edit lyrics, translations, and individual line timings.
• Set when the lyrics start or sync a selected line with the current video position.
• Adjust text size, vertical placement, and whether the next line is shown.
• Use the lyrics overlay in fullscreen.
• Save projects locally for each video and import or export them as JSON.
• Optionally translate lyrics with OpenAI using your own API key.
Getting started:
Open a YouTube video and use the gear button next to Karaoke to find or import lyrics. Click Karaoke to enable the overlay. You can also
toggle it with Alt+K.
Lyrics availability varies, and live performances may require manual timing adjustments. The extension does not automatically analyze audio
or generate word-by-word timing.
Privacy:
Projects and settings are stored locally in your browser. Lyrics searches are sent to LRCLIB. Automatic translation sends lyrics to OpenAI
only when you request it and requires your own API key; API usage may incur charges. Your API key is stored locally in the extension's
settings.
timing to match the performance you are watching.
Features:
• Search LRCLIB for lyrics, import LRC files, or paste your own lyrics.
• Display Japanese kanji and kana alongside translations.
• Edit lyrics, translations, and individual line timings.
• Set when the lyrics start or sync a selected line with the current video position.
• Adjust text size, vertical placement, and whether the next line is shown.
• Use the lyrics overlay in fullscreen.
• Save projects locally for each video and import or export them as JSON.
• Optionally translate lyrics with OpenAI using your own API key.
Getting started:
Open a YouTube video and use the gear button next to Karaoke to find or import lyrics. Click Karaoke to enable the overlay. You can also
toggle it with Alt+K.
Lyrics availability varies, and live performances may require manual timing adjustments. The extension does not automatically analyze audio
or generate word-by-word timing.
Privacy:
Projects and settings are stored locally in your browser. Lyrics searches are sent to LRCLIB. Automatic translation sends lyrics to OpenAI
only when you request it and requires your own API key; API usage may incur charges. Your API key is stored locally in the extension's
settings.
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Permissions and data
Required permissions:
- Access your data for www.youtube.com
- Access your data for lrclib.net
- Access your data for api.openai.com
- Access your data for www.edrdg.org
- Access your data for raw.githubusercontent.com
- Access your data for api.github.com
Required data collection, according to the developer:
- Authentication information
- Search terms
- Website content
More information
- Add-on Links
- Version
- 1.3.2
- Size
- 120.88 KB
- Last updated
- 8 days ago (Sep 15, 2026)
- Related Categories
- License
- MIT License
- Privacy Policy
- Read the privacy policy for this add-on
- Version History
- Add to collection