LanguageMaster

The ULTIMATE Platform for Language Learning

Featuring Rooster Video Tools and Rooster MasterLingQ

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LanguageMaster Apps & Playgrounds

Transcription Playground

Transcription Playground

Test Whisper-based transcription on your audio/video. Upload, transcribe, and export captions (VTT/SRT/TXT) in seconds.

API Playground

API Playground

Explore and test LanguageMaster APIs in your browser. Try endpoints, inspect responses, and copy ready-to-use snippets.

Web Reader

Web Reader

Read with focus. Clean, distraction-free layout with bilingual lines, quick lookups, and word tracking.

Lesson Create

Lesson Create

Turn videos, audio, and text into interactive lessons. Import subtitles, attach audio, and publish to your library.

Course Editor

Course Editor

Create & manage private courses from your lesson collection.

Course Editor

Lesson Editor

Edit and explore your private LanguageMaster lessons.

Language Guides

Language Guides

Generate guides for all languages, tailored to your native language.

Vocabulary

Vocabulary

Create and manage words with tags, SRS, examples, and audio. Bulk import and AI-assisted entries supported.

SRS Review

SRS Review

Master your target vocabulary with games and exercises.

Milestones

Milestones

Track progress with language-specific milestones. Visualize words read, listening time, and goals over time.

Private Library

Private Library

Your personal lessons and courses. Organize, filter, and resume instantly across devices.

Coming Soon Public Library

Public Library

Browse & share community courses with ratings, tags, and curated collections.

Universal Player

Universal Player

Web based video player that supports Rooster Video Tools.

Rooster MasterLingQ

Enhance LingQ.com with an advanced reader, imports, hotkeys, and pro editing tools.

Chrome Chromium Firefox Firefox Dev Edge
Rooster Reader

Rooster Reader

  • Auto-scrolling captions with dual-line translations
  • Word sidebar with rich lookups & stats
  • Inline translation & transliteration elements
  • Phrase LingQing directly in captions
  • Fully movable/resizable floating UI
Course Upload

Course Upload

  • 1-click upload: text + image + audio
  • Auto-split by word count
  • Bulk TXT/SRT/VTT lesson imports
  • Batch audio → transcript → lessons
Hotkeys

Hotkeys

  • Rebind native LingQ reader keys
  • 20+ extra shortcuts for speed
  • Single-key or modifier combos
Playlist Importer

Playlist Importer

Import from YouTube, Podcasts (ListenNotes/Apple), Spotify, Streaming/Movies, Gutenberg/LibriVox, TikTok, Rumble, ARD, Helsingin Sanomat, MegaTV, RuTube.

  • Smart search & de-duplication
  • Download audio/video/subtitles when supported
  • Direct lesson creation on LingQ
Lesson Menu

Lesson Menu

  • Quick access to Reader, Editor, Filters
  • Duplicate lessons, AutoLingQ & more
  • Export audio-by-sentence, subs, words, Anki
Lesson Editor

Lesson Editor

  • Format, find/replace, timestamp tools
  • Lesson & Sentence Waveforms
  • Compare lesson audio vs TTS
  • Faster clean-up & publishing

Rooster Reader Video

Quick overview of key workflows and UI.

Learn More Pricing

Rooster Video Tools

The ULTIMATE extension for learning through video on 50+ sites and 150+ languages — powered by leading AIs.

LingQ LanguageMaster
Chrome Chromium Firefox Firefox Dev Edge
Captions & Playback

Captions & Playback

  • Paired captions (study + translation)
  • Inline word & translation elements
  • Transliteration overlay (per language)
  • Phrase LingQing in captions
  • Spoken/Non-spoken auto speed
  • Word-level timestamp markers
  • Shadow caption pause & replay
  • Prev/Next caption & time adjust
  • Offset timing, hover-pause, blur on idle
Transcribe Providers

Transcribe

Generate subtitles via multiple Whisper providers:

  • Deepgram • LemonFox • Fireworks
  • Gladia • Deepinfra • AssemblyAI
  • Cloudflare Worker (Flare)

Most options are token-based.

Text to Speech

Text-to-Speech

  • ElevenLabs • Deepgram • VoiceForge
  • Amazon Polly • Google Cloud • Azure
  • Meta voices • Local browser voices
  • TikTok novelty & multilingual voices
Translate Providers

Translate

  • DeepL • Google Cloud • Microsoft Azure
  • Libre • TartuNLP • Bergamot
  • Meta • ChatGPT
  • DeepSeek • Gemini
Dictionaries

Dictionaries

  • GPT (4o-mini / 4o / o1)
  • Google & Microsoft lookups • Yandex
  • Reverso • Wiki • Libre • TartuNLP • Bergamot • Meta
Transliteration & Diacritics

Transliterate · Diacritics · Splitting

  • GPT (4o-mini / 4o / o1) • Llama
  • Homebrew: Serbian, Arabic, Belarusian, Gujarati, Georgian, Macedonian, Hindi, Khmer, Persian, Hebrew; Cantonese: Yựtyựt
  • RussianGram • Farasa-QCRI • Slovnyk • ALittleHebrew • EzLang
  • spaCy lemma (select langs) • Thai Word Cut
LingQ Integration

LingQ Integration

  • Profile sync; stats: words read & listening time
  • Auto course/lesson creation & lesson re-load
  • Word/Phrase status updates from captions
  • Transcribe • Transliterate • TTS • Word/Sentence translate

Watch Demos

Supported Websites Learn More Pricing