Item logo image for Dual Subs

Dual Subs

ExtensionEducation
Item media 2 (screenshot) for Dual Subs
Item media 1 (screenshot) for Dual Subs
Item media 2 (screenshot) for Dual Subs
Item media 1 (screenshot) for Dual Subs
Item media 1 (screenshot) for Dual Subs
Item media 2 (screenshot) for Dual Subs

Overview

Two caption lines on YouTube: your language on top, the original below. Uses YouTube's own captions; collects no data.

Watch YouTube with two caption lines: your language on top, the original language right below it, like the bilingual subtitles of classic Hong Kong films. • Your language on top, larger; the original underneath, smaller, both centred on one caption box. • A video that is already in your language keeps YouTube's ordinary single line. • Uses YouTube's own captions only: a human track in your language when the video has one, otherwise YouTube's own translation. No account, no API key, nothing to pay. • Auto-generated captions stay steady: one sentence at a time, no jumping lines. • A settings menu beside the CC button, in the player's own style: on/off, top and bottom language (with search), box colour and opacity, line gap and sizes. • YouTube's own captions are never hidden. If anything goes wrong, you still have them. • To put the original language on the bottom line, it may switch the player's caption track, the same as picking one from the CC menu; while both lines show, it restyles the player's caption to match. Privacy: collects no data at all. It runs only on youtube.com, talks only to youtube.com, and keeps your settings in your own browser. Policy: https://github.com/operonlab/userscripts/blob/main/yt-dual-subs/PRIVACY.md Open source (MIT): https://github.com/operonlab/userscripts Also available as a userscript for Tampermonkey / Violentmonkey. Not affiliated with or endorsed by YouTube or Google.

Details

  • Version
    0.5.1
  • Updated
    October 15, 2026
  • Offered by
    operonlab
  • Size
    23.49KiB
  • Languages
    3 languages
  • Developer
    Email
    jones@joneshong.com
  • Non-trader
    This developer has not identified itself as a trader. For consumers in the European Union, please note that consumer rights do not apply to contracts between you and this developer.

Privacy

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The developer has disclosed that it will not collect or use your data. To learn more, see the developer’s privacy policy.

This developer declares that your data is

  • Not being sold to third parties, outside of the approved use cases
  • Not being used or transferred for purposes that are unrelated to the item's core functionality
  • Not being used or transferred to determine creditworthiness or for lending purposes

Support

For help with questions, suggestions, or problems, visit the developer's support site

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