ToneSub

by mk18560884319 · Education

Manifest V3 Free

View in Chrome Web Store Data as of 15 Oct 2026

Fast bilingual subtitles for YouTube videos, with automatic target-track and translation fallback.

Users

0 in 30 days

Rating

0.0 / 5

unchanged in 30 days

Ratings

0 in 30 days

Store rank

#349K

#268K among extensions

Version

1.1.4

updated 23 Jul 2026

Users

monthly, 3 months

Latest, 15 Oct 2026: 3 usersMove the mouse over the chart for any month

Ratings count

monthly, 3 months

Latest, 15 Oct 2026: 0 ratingsMove the mouse over the chart for any month

The Chrome Web Store rounds user counts down to the leading digit, so the user line moves in steps. The ratings count is exact and is the better signal of real adoption.

About ToneSub

ToneSub adds fast bilingual subtitles to YouTube videos. It displays the original captions alongside a target-language translation, automatically preferring YouTube’s available target-language caption track and using a translation fallback when needed. Customize subtitle order, position, font, size, colors, background, and outline to match your viewing style. Optional DeepSeek BYOK AI enhancement is off by default. It only activates after you provide your own API key, confirm the in-extension data disclosure, and grant the optional permission. ToneSub works only on YouTube video pages. It has no ads, no account system, and no developer-operated backend.