Language Reactor alternative

Dual subtitles, plus Pinyin and Romaji.

SubHamster shows up to three subtitle rows on the same screen: the original line, a translation into your language, and the pronunciation. Learn by watching what you would watch anyway, no flashcards required.

Install free See what it does

Free to install · Chrome, Edge, Opera and Brave · No account needed

YouTube Netflix, Prime Video, Disney+ Pinyin & Romaji

Coming from another tool?

A friendly alternative for learning while you watch

Language Reactor is a well loved way to learn with Netflix and YouTube. SubHamster follows the same idea, real video instead of drilling, and takes it further: a third subtitle row for pronunciation like Pinyin and Romaji, across YouTube, Netflix, Disney+ and Prime Video. If you have used a dual subtitle tool before, this will feel familiar on day one.

What you get

Everything on screen, at the same time

You pick which lines show up, how they look and where they sit.

Three rows at once

Original, translation and pronunciation, stacked and in sync. Read all three without pausing.

Pinyin and Romaji

Read Chinese in Pinyin with tone marks, and Japanese in Romaji. The sounds, spelled out in Latin letters.

Four platforms

YouTube, Netflix, Disney+ and Prime Video. The same setup follows you across all of them.

Any language pair

Choose the source line and your own language. Watch a Korean show with Korean plus English, or the other way around.

In real time

The translation shows up together with the original line, not a beat later, so nothing breaks your flow.

Free to start

Install and try it right away. The full version is a small subscription, handled inside the extension.

At a glance

What SubHamster puts on your screen

✓

Dual subtitles, and a third rowOriginal plus translation is the baseline. Add a pronunciation line for three rows in total.

✓

Pinyin with tone marksFor Chinese, read the pronunciation right under the characters.

✓

Romaji for JapaneseFollow the sounds before you know every kana and kanji.

✓

YouTube, Netflix, Disney+ and Prime VideoOne extension, the four places you already watch.

✓

Style each line on its ownColor, size, position and background, set separately per language.

✓

Everything stays in your browserProcessing only serves to show the subtitles to you. We never sell your data.

Side by side

SubHamster vs Language Reactor

A fair look. Language Reactor is great for dictionary and flashcard workflows. SubHamster is built for watching, with more rows and more platforms.

Feature	SubHamster	Language Reactor
Subtitle rows on screen at once	Up to 3 (original, translation, pronunciation)	2 (original and translation)
Pronunciation as a third row (Pinyin, Romaji)	Yes	No
Platforms	YouTube, Netflix, Disney+, Prime Video	YouTube and Netflix
Real time dual subtitles	Yes	Yes
Dictionary and Anki flashcard export	Focused on watching, not flashcards	Yes
Price	Free to install, then 3.99 US$ per month or 39.99 US$ per year	Free, with a paid PRO plan

FAQ

Questions people ask

Is SubHamster a good Language Reactor alternative?

Yes. If you like learning from real video instead of flashcards, SubHamster will feel familiar. It shows dual subtitles on YouTube, Netflix, Disney+ and Prime Video, and it adds a third row for pronunciation such as Pinyin and Romaji.

Can it show dual subtitles on Netflix and YouTube at the same time?

Yes. You can show the original subtitle and a translation into your language together, so you read both lines at once without pausing or rewinding.

Does SubHamster show Pinyin subtitles for Chinese?

Yes. It can add a Pinyin line with tone marks under Chinese subtitles, so you read the pronunciation while you watch.

Does it show Romaji subtitles for Japanese?

Yes. For Japanese it can show a Romaji line, so you can follow the sounds even before you know all the kana and kanji.

Which platforms and browsers work?

SubHamster runs on YouTube, Netflix, Disney+ and Prime Video, in Chromium browsers: Chrome, Edge, Opera and Brave. Safari and Firefox are not supported yet.

Is it free?

Installing is free and you can try it right away. The full version is a subscription handled inside the extension, at $3.99 per month or $39.99 per year.