SubPair / Guides
SubPair vs Language Reactor
Short answer: both are Chrome extensions that show two subtitle lines on Netflix and YouTube. Language Reactor is the established choice and also works with imported text and websites. SubPair adds Disney+ and keeps word and phrase saving, plus 100 auto-translated lines a day, on its free plan. SubPair is not on the Chrome Web Store yet.
Checked on 1 November 2026 against each product's own public pages (sources at the bottom). Details change, so check their sites for current terms.
What is SubPair?
SubPair is a Chrome extension that shows two subtitle lines at once on Netflix, YouTube and Disney+: the original and a translation in your language. Click any word for its meaning, save words and phrases, and review them later. The free plan includes unlimited dual subtitles from each platform’s own subtitle tracks; Pro costs $4.99 a month or $39 a year.
Side by side
| Feature | SubPair | Language Reactor |
|---|---|---|
| Streaming sites | Netflix, YouTube, Disney+ (Prime Video is not supported) | Netflix and YouTube; Disney+ and Amazon Prime not supported yet [1] |
| Beyond video | Streaming video only | Also imported text, books and websites on LanguageReactor.com [2] |
| Computers | Desktop Chrome on Windows, macOS, Linux and ChromeOS | Chrome on Windows and macOS desktops and laptops [2] |
| Second line from the platform’s own subtitles | Yes, free and unlimited | Yes, when the title has a subtitle track in your language [1] |
| Auto-translation when a language is missing | 100 lines a day free (lines already translated before don’t count); unlimited on Pro | A Pro feature (“machine translations”) [1] |
| Saving words and phrases | Free and unlimited | A Pro feature; words saved earlier stay viewable and exportable after Pro ends [1] |
| Paid plan | Pro: $4.99 a month or $39 a year | Pro, sold as an in-app purchase; the price is not stated on its FAQ or store listing [2] |
| Availability | Coming soon to the Chrome Web Store | On the Chrome Web Store (version 6.0.1, updated 20 October 2026) [2] |
When Language Reactor is the better fit
- You want to start today: it is on the Chrome Web Store, and SubPair isn’t yet.
- You also study from books, articles or websites, not only from video.
- You already have a vocabulary history there and want to keep using it.
When SubPair is the better fit
- You watch on Disney+ as well as Netflix and YouTube.
- You want to save words and phrases without paying, with spaced-repetition review and CSV or SRT export on the free plan.
- Your language pair is often missing on Netflix, and 100 free auto-translated lines a day cover what you watch.
- You use Linux or ChromeOS (Language Reactor’s store listing names Windows and macOS).
How SubPair builds the second line
On Netflix and YouTube, SubPair first looks for the platform’s own subtitle track in your language and lines it up with the original by time, so the second line is ready as the episode starts and never counts toward a limit. Auto-translation only fills the lines or languages a title doesn’t have. On Disney+, SubPair translates each line as Disney+ shows it. The setup guides explain each platform: Netflix, YouTube and Disney+.
Questions
Yes, for watching with two subtitle lines on Netflix and YouTube, and it adds Disney+. SubPair's free plan includes unlimited dual subtitles from the platform's own subtitle tracks, 100 auto-translated lines a day and unlimited word and phrase saving. Pro costs $4.99 a month or $39 a year. SubPair is not on the Chrome Web Store yet; Language Reactor is available now.
Its FAQ says Disney+ and Amazon Prime are not supported yet (checked 1 November 2026). SubPair supports Disney+ in line-by-line mode; SubPair does not support Prime Video either.
Yes. If both are switched on for the same video, you may see two sets of subtitles, so turn one of them off while you watch.
Sources
- Language Reactor, Help & FAQ (“What does the Pro subscription include?”, “What happens if I cancel my Pro subscription?”, “Do you support Disney+/Amazon Prime/Android/etc?”), checked 1 November 2026.
- Language Reactor on the Chrome Web Store (description and details), checked 1 November 2026.
- SubPair: this website’s pricing and FAQ.
SubPair is an independent product and is not affiliated with Language Reactor, Netflix, YouTube/Google or Disney. Language Reactor is a trademark of its owner.