The 3 Best Prime Video Dual Subtitle Extensions in 2026

The best extension for Prime Video dual subtitles is Sublo if you want the original line and a translation in any of 58 languages, InterSub if you want to look up words as you watch, and Immersive Translate if you also translate web pages and PDFs. Only three of the subtitle extensions we compared name Prime Video, so the list is short.

Sublo and InterSub show dual subtitles, Immersive Translate bilingual ones. They differ in how they translate and in what they add on top. Below you'll find a comparison table, a short verdict for each, and a word on the popular tools that are missing: Prime Video is not among the services that Language Reactor, Trancy, Dualsub or eJOY name.

Sublo is our product. We list it first because it names more streaming services than the other two and translates into 58 languages, and we say plainly where InterSub and Immersive Translate do something better. Platforms are as each vendor names them on its own website or store listing, checked in November 2026.

The 3 extensions at a glance

Services as each vendor names them on its website or store listing, checked November 2026. These lists change, so check the vendor's page before you pay.

1. Sublo: best for translating Prime Video subtitles

Best for: viewers and learners who want the original line and a translation together
Works on: Prime Video, Netflix, Disney+, HBO Max, Hulu, Paramount+, Peacock, Crunchyroll, YouTube, Apple TV+, MUBI and Plex; other video sites can be switched on from the popup

Sublo takes the subtitle track Prime Video is already playing and shows a translated line together with the original, or only the translation, in real time. The translation comes from Google Gemini, an AI model that translates whole lines in context, into any of 58 languages. So you are not limited to the subtitle languages a title happens to offer in your country.

Install it in Chrome or Edge, pick the two languages in the popup and press play. Size, position and colours of both lines are adjustable. The free plan includes a daily allowance of translated subtitles on every supported service, without an account or card. Pro removes the limit from €2.89 a month billed yearly. More on Sublo for Prime Video, or follow our guide to dual subtitles on Prime Video.

2. InterSub: best for looking up words while you watch

Best for: learners who want to build vocabulary from what they watch
Works on: Prime Video, Netflix, YouTube, HBO Max, Crunchyroll, Udemy and Coursera, according to its website

InterSub combines dual subtitles with a pop-up dictionary, so you can check a word without opening another tab. Its website names Prime Video together with Netflix, YouTube, HBO Max and Crunchyroll, plus course sites such as Udemy and Coursera.

Dual subtitles are free, with a limited number of word lookups. AI subtitle translation is in its paid plans. Pick it if new words are the reason you watch. If you mainly want to follow the story in your own language, a translation-first tool like Sublo is the simpler fit.

3. Immersive Translate: best if you translate more than video

Best for: people who also translate web pages and PDFs
Works on: YouTube, Netflix, Prime Video, HBO Max and many other video sites, according to its website

Immersive Translate is a general translator: it translates web pages and PDFs and adds bilingual subtitles to many video sites. Its video page names Prime Video, together with YouTube, Netflix and HBO Max.

Its strong point is choice. You pick the translation service yourself, among many such as ChatGPT, DeepL, Google Translate, DeepSeek and Gemini. A Pro plan exists; check its website for what each plan includes. It makes sense if you want one extension for reading and watching. If Prime Video subtitles are all you need, see how the two compare in Sublo vs. Immersive Translate.

Prime Video's own subtitle settings

Prime Video lets you pick one subtitle language at a time, from the ones a title offers. Which languages you get varies by title and by country, so a series can have your language in one country and not in the next.

That is enough when the language you want is in the menu and one line on screen is all you need. You need an extension in two cases: you want two lines at once, for example the original and your own language, or the title doesn't offer your language at all. Google Translate's page translation in Chrome won't help with either, because it does not translate streaming subtitles. More in how to translate Prime Video subtitles.

Popular extensions that don't name Prime Video

Some of the best-known subtitle extensions are not ranked here, because Prime Video is not among the services they name:

• Language Reactor: built for Netflix and YouTube, with a strong study workflow and translation by Google Translate. It is the extension that made dual subtitles popular.
• Trancy: bilingual subtitles, strongest on YouTube. Its website also names Netflix, HBO Max and course sites such as TED, edX and Coursera.
• Dualsub by Dualsub Studio: YouTube first; its store listing also names Netflix, Disney+ and Coursera. Several unrelated extensions use a similar name, so check the publisher.
• eJOY: an English-learning toolkit for Netflix and YouTube, with word saving and flashcards.

If you already use one of them on Netflix or YouTube, you don't have to give it up. Keep it there and add one of the three above for Prime Video. For Language Reactor in particular, see Does Language Reactor work on Prime Video?

Which one should you pick?

• You want to understand a Prime Video show in your language, or see the original and a translation together: Sublo.
• You want to look words up as you watch: InterSub.
• You also translate web pages and PDFs, or want to choose the translation service: Immersive Translate.
• Prime Video already offers your language and one line is enough: no extension; use Prime Video's own subtitle settings.
• You also study with Netflix and YouTube: Language Reactor there, and one of the three above on Prime Video.

Watching on HBO Max too? See the best subtitle extensions for HBO Max. New to two subtitle lines? Start with dual subtitles explained.

How we compared them

We started from the extensions in our full list of subtitle extensions. We set aside two study tools: asbplayer, which is not a translator, and Migaku, which is built around Anki-style flashcards. Of the other seven, we ranked the three whose own website or store listing names Prime Video. Then we compared them on four points: which streaming services each one names, whether it shows two subtitle lines, how the translation is made, and what it adds on top, such as a dictionary. The platform lists come from each vendor's website or store listing in November 2026.

We don't list prices for the other tools, because they change often; check them on the vendor's site. LingQ comes up in many comparisons too, but it is a full course platform rather than a subtitle extension, so it is left out. Sublo is made by an independent developer in Hannover, Germany, and is not affiliated with Prime Video or any other streaming service.

Frequently asked questions

Does Language Reactor work on Prime Video?

Prime Video is not among the services Language Reactor names: it is built for Netflix and YouTube. For dual subtitles on Prime Video, use an extension that names it, such as Sublo, InterSub or Immersive Translate. More in Language Reactor and Prime Video.

How do I get two subtitles at once on Prime Video?

Amazon Prime Video shows one subtitle language at a time, so dual subtitles (some people say double subtitles) need a browser extension. With Sublo, install it in Chrome or Edge, pick the two languages in the popup and press play: the original and the translated line appear together. Details in our guide to dual subtitles on Prime Video.

Can Prime Video translate subtitles itself?

Not into a language the title doesn't offer. Prime Video lets you pick one subtitle language from those available for that title in your country. For any other language, Sublo translates the subtitle track Prime Video plays into 58 languages with Google Gemini.

Is there a free Prime Video subtitle translator?

Yes. Sublo's free plan includes a daily allowance of translated subtitles on Prime Video and every other supported service, without an account or card. InterSub's dual subtitles are free with a limited number of word lookups; its AI subtitle translation is in its paid plans.

Do these extensions work on phones or smart TVs?

Sublo doesn't: it runs in Chrome and Edge on a computer, and there is no app for phones, tablets or TVs. For InterSub and Immersive Translate, check the vendor's website.