Language Reactor alternatives
Language Reactor
alternatives
Language Reactor shows two lines of subtitles on streaming sites and YouTube, and it runs in Chrome. If you use Firefox or Edge, or want the words you save to come back for review, these are the tools people move to, with what each does and where it runs.
By Reza Pirighadim, who makes Lexpad. Checked against the app on 24 October 2026.
Choose Language Reactor if
- Two lines of subtitles on streaming sites and YouTube is what you want.
- You use Chrome.
- You like reading imported texts in its own reader.
Choose Lexpad if
- You use Firefox or Edge, or Chrome.
- You want each word saved with its line, in one notebook that brings it back.
- You also learn from web pages, TED, lessons or Google Meet calls.
- Checked
- 24 October 2026
- Order
- A to Z, not a ranking
- Tools
- Six, with Language Reactor
- Ours
- Lexpad, marked as ours
The short answer
Language Reactor’s own site offers only its Chrome extension, and its Chrome Web Store listing names Chrome on Windows and macOS computers (languagereactor.com, Chrome Web Store, 24 October 2026). We found no listing from its maker on Firefox Add-ons or Microsoft Edge Add-ons that day.
- In Firefox: asbplayer, Lexpad and Trancy have Firefox Add-ons listings.
- In Edge: Lexpad and Trancy are in Microsoft Edge Add-ons.
- To keep every word with its line and review it on a schedule: Lexpad, or Migaku and asbplayer with Anki.
- Free: asbplayer is free and open source; Lexpad and Trancy have free plans.
- Two lines of subtitles remain Language Reactor’s strength, with Trancy and Lingopie doing the same.
At a glance
Alphabetical, not a ranking. Each cell says what the tool does; no prices, because they change often and differ by country.
| Tool | Where it works | Browsers (official) | Subtitles | Saving words | Review | Free to use |
|---|---|---|---|---|---|---|
| asbplayer | Streaming sites, other video sites (a best-effort guess), and video files on your computer | Chromium browsers and Firefox | The site’s subtitles or your own subtitle file | Sends sentence cards with a screenshot and audio to Anki | In Anki | Free and open source |
| Language Reactor | Streaming sites and YouTube; its own catalogue and imported texts | Chrome | Two lines: the original and a translation | A saved-items list; saving across all its features is part of Pro | Its PhrasePump reviews saved words; export to Anki | Free; Pro adds machine translation and saving words |
| Lexpad (ours) | Any web page; YouTube; TED, lesson pages and common web players; Google Meet captions | Chrome, Edge and Firefox, each from its own store; Brave, Opera and Vivaldi through the Chrome Web Store | One line; click a word for its card | The word, its line and where you met it, in your notebook | Leitner boxes or Smart (FSRS, Beta), on the web, Android, Mac and Windows | Free plan with unlimited words; Pro optional |
| Lingopie | Its own catalogue of shows, and an extension for videos in the browser | Chrome | Two lines, with click-to-translate | A vocabulary list and video flashcards | In Lingopie | Subscription, with a free trial |
| Migaku | Streaming sites, YouTube and video files on your computer | Chrome | Interactive subtitles with a click dictionary | One-click cards with a screenshot and audio; Anki export | Its own spaced repetition, in its apps | Paid, with a trial |
| Trancy | YouTube, streaming sites, TED, course sites, web pages and PDFs | Chrome, Edge, Firefox, Safari and others | Two lines, written by AI | A wordbook (100 words and 50 sentences on the free plan) | Flashcard practice | Free plan; Premium |
What Language Reactor does well
Language Reactor (from Dioco) adds two lines of subtitles, a click dictionary and playback controls to streaming sites and YouTube, and has its own catalogue and a reader for imported texts (its site). Its PhrasePump reviews saved words, and saved items can go to Anki with screenshots and audio. Saving words across all its features is part of Pro, which also adds machine translations (Pro mode, FAQ). The Chrome Web Store shows version 6.0.1, updated 20 October 2026 (listing).
If you watch in Chrome and want both languages on screen at once, it is hard to beat.
Lexpad: the word, its line, and reviews
Lexpad is a vocabulary notebook with a free browser extension for Chrome, Edge and Firefox, made by the author of this page (who makes Lexpad). It shows the subtitle line as the site does; you rest the pointer on it, the video waits, and a click on a word opens its card with the meaning. Add it, and the line is saved as the word’s example, with a note of the page and the moment. The word then comes back for practice on a schedule, on the web, in the Android app and in Lexpad for Mac and Windows.
- YouTube subtitles, and TED, lesson pages and common web players.
- Film and series services start off; turn each on in the Lexpad menu.
- Google Meet live captions, which hold still under the pointer.
- Any word you select on a web page, with its sentence.
The free plan keeps unlimited words and gives 25 AI cards a day (400 a month). Where Language Reactor fits better: two lines of subtitles and whole-line translation.
Trancy
Trancy shows AI-written two-line subtitles on YouTube, streaming sites, TED and course sites, translates web pages and PDFs, and keeps a wordbook with flashcard practice (trancy.org). Its download page lists Chrome, Edge, Firefox and Safari, and it has phone apps (download page; Firefox Add-ons, version 7.9.5). The free plan bookmarks 100 words and 50 sentences; Premium removes the limits (pricing).
It suits learners who want two lines of subtitles in Firefox or Edge, and translation beyond video.
Migaku
Migaku makes subtitles on streaming sites and YouTube clickable, explains words, and turns a line into a card with a screenshot and audio in one click, reviewed with its own spaced repetition in its phone apps or exported to Anki (Chrome Web Store, version 1.31.1). Its FAQ says the extension is designed for Google Chrome (FAQ). It is a paid product with a trial (pricing).
It suits learners who mine sentences seriously and want audio and pictures on each card.
asbplayer
asbplayer is free and open source (AGPL-3.0). It plays the subtitles of streaming sites, or your own subtitle file beside a video on your computer, and sends sentence cards with a screenshot and audio to Anki through AnkiConnect (GitHub). It runs in Chromium browsers and Firefox (compatibility; Firefox Add-ons, version 1.22.0). For word look-ups its makers suggest the separate Yomitan add-on.
It suits Anki users who are happy to set up a few tools.
Lingopie
Lingopie is a subscription service with its own catalogue of shows, dual subtitles and click-to-translate, on the web, phones and TV apps. Its browser extension runs on Chrome only, by its own listing, and saves words and phrases to your Lingopie vocabulary list for video flashcards (Chrome Web Store, help centre).
It suits learners who want shows picked for learning, ready to watch.
How to choose
- Which browser? Firefox: asbplayer, Lexpad or Trancy. Edge: Lexpad or Trancy. Chrome: any of them.
- Two lines on screen, or one word at a time? Two lines: Language Reactor, Trancy or Lingopie. One line, with a card for the word you click: Lexpad.
- Where should the reviews happen? In Anki: asbplayer or Migaku. In the same app, on your phone and computer: Lexpad, Migaku or Trancy.
- Videos only, or the rest of your day too? Lexpad also keeps words from web pages, Google Meet calls and, with the desktop app, any app on your computer.
Good to know
Questions
Does Language Reactor work in Firefox?
Its own site offers only the Chrome extension, and we found no Firefox Add-ons listing from its maker on 24 October 2026. asbplayer, Lexpad and Trancy are on Firefox Add-ons.
Does Language Reactor work in Edge?
Edge can install many extensions from the Chrome Web Store, but Language Reactor names only Chrome on its site and listing. Lexpad and Trancy are in Microsoft Edge Add-ons.
What is a free alternative to Language Reactor?
asbplayer is free and open source. Lexpad’s free plan keeps unlimited words and gives 25 AI cards a day (400 a month). Trancy’s free plan bookmarks up to 100 words.
Can I bring my Language Reactor words into Lexpad?
Language Reactor says saved items can be exported to Anki. Lexpad imports an Anki deck (.apkg) or a CSV; review history, pictures and sounds do not come across. See moving words into Lexpad.
Why is Lexpad on this list if you make it?
Because learning words from video is one of the things it is for. It is marked as ours, the list is alphabetical, every fact about another tool links to where we read it, and the page says where each tool fits better.
Lexpad
Start a notebook for the words you meet.
Lexpad is free to start, on the web and on Android. Bring the words you meet.