AI Shadowing — Master any language by shadowing YouTube videos

AI Shadowing turns any YouTube video into a personal language-learning lesson. Paste a link, and our AI generates accurate subtitles in seconds, splits them into shadow-able sentences, and explains every word in your native language. Free to start, no signup required, works in any browser.

How it works

Paste a YouTube link. Any video, any language. Auto-detected.
AI prepares your transcript. Raw subtitles appear in 1–2 seconds. Then AI refines each sentence with proper punctuation, smart segmentation, and meaning chunks.
Practice & learn. Shadow each sentence with four play modes. Click any word for an instant context-aware explanation in your language.

What makes it different

AI-Refined Subtitles — Powered by Gemini 2.5 Flash. Adds the punctuation and segmentation that YouTube's auto-captions miss, without ever fabricating words.
Explanations in your language — Click any word for meaning, grammar notes, and example sentences in your native language. 11 languages supported.
Built for Shadowing — Four play modes (Continuous, Step-through, Auto-pause, Loop) and 0.5x–2x speed control, designed specifically for the shadowing technique.
Zero installation — Just a website. Works in Chrome, Safari, Firefox, Edge, mobile browsers. No extension to install.
Local files supported — Upload your own audio or video files for the same shadowing experience.
Cross-device sync — Sign in (optional) to sync your library and progress across phone, tablet, laptop.

What is shadowing?

Shadowing is a language-learning technique where you repeat a sentence in your target language a half-second after hearing it, matching the speaker's pronunciation, rhythm, and intonation as closely as you can. Originally developed for interpreter training, it's now widely used by polyglots worldwide to build active fluency from real spoken content.

Frequently asked questions

Is it really free? Yes. Core features are free with no usage caps. Sign in (optional) to save your library across devices.

Do I need an account? No. Try everything immediately without signing up. Sign-in only required for cross-device sync.

What languages? Any language with YouTube captions — English, Spanish, French, German, Italian, Portuguese, Russian, Japanese, Korean, Chinese, Arabic, and more.

How is this different from a browser extension? AI Shadowing is a regular website — works on any browser, doesn't slow down your YouTube, and doesn't read your other browsing data.

Have feedback or found a bug? Email feedback@aishadowing.net

This page requires JavaScript to use interactive features. Please enable JavaScript in your browser.