Dual Subtitles & Shadowing for Netflix by Do5

Practice a new language with the Netflix stories you love. Go from understanding to speaking.

Dual subtitles. Sentence-by-sentence shadowing. Follow the story with two subtitle tracks, and practice speaking along with the original audio.

Turn your favorite dialogue into your next practice session. Netflix Dual Subtitles & Shadowing brings dual subtitles, sentence replay, slow listening, and word lookup into one viewing experience—so you spend less time dragging the progress bar and more time listening closely, imitating, and speaking.


Display two subtitle tracks provided by the title at the same time. Follow your learning language while referring to another language for support. The primary subtitles guide sentence-by-sentence practice, while the secondary subtitles help with comprehension. Adjust the font size, opacity, and position of each subtitle line independently.

Move your pointer to the edge of a subtitle to drag it, or use the corner handles to adjust its font size. A center alignment guide helps you position the subtitles, and you can keep the current text visible while playback is paused. Controls stay in the browser’s side panel, so you can focus on the video and subtitles.


Find an expression worth imitating? Replay the current subtitle segment, then practice its pronunciation, rhythm, and intonation with the original audio. Jump directly to the previous or next sentence without searching through the timeline each time.

Switch between three practice modes: Free Playback, Pause After Each Sentence, and Single-Sentence Loop. Pause After Each Sentence gives you time to speak. Single-Sentence Loop includes an adjustable pause for shadowing, making it easier to practice the same dialogue repeatedly.


Listen to the current sentence at 0.75× or 0.5× speed. After playing it once, the extension pauses playback and restores your previous playback speed. Trigger it again to listen once more. You can also skip forward or backward by a configurable number of seconds to practice at your own pace.


Select unfamiliar words, phrases, or entire sentences in either subtitle line to see AI-generated explanations or translations. During the trial, look up text by clicking or manually selecting it. VIP members can use hover lookup or manual text selection.

By default, translation works in both directions between your primary and secondary subtitle languages—not just between English and Chinese. You can also choose a target language manually. English entries can show British and American phonetic transcriptions where available, with British and American pronunciation audio. For other languages, the original text is read aloud using supported voices. No need to configure your own translation or text-to-speech API keys.


The persistent side panel brings playback controls, practice modes, and settings together. Keyboard shortcuts are customizable, and the interface supports light mode, dark mode, or your system theme.

Subtitle styles, practice preferences, and keyboard shortcuts are saved locally in your current browser and retained across normal restarts. Settings can be backed up and restored, and resetting to defaults requires confirmation. Before uninstalling the extension or switching browser profiles, back up any settings you want to keep.

1. Install the extension and open a Netflix title you are authorized to watch in Chrome on your desktop.
2. Click the extension icon to open the side panel. Choose your primary and secondary subtitle languages, then wait for the available subtitle tracks to finish loading.
3. Adjust the appearance of both subtitle lines and start using dual subtitles for free.
4. To try shadowing, word lookup, or pronunciation, manually start today’s trial in the Membership Center or enter a valid VIP code.
5. Choose Pause After Each Sentence or Single-Sentence Loop, replay or slow down the dialogue, and practice speaking with the original audio.

S: Replay the current sentence
A / D: Previous sentence / Next sentence
Q / W: Pause After Each Sentence / Single-Sentence Loop
Z / X: Play the current sentence once at 0.75× / 0.5× speed
Shift + ← / →: Skip backward / forward by the configured number of seconds; the default is 3 seconds

These shortcuts work on Netflix playback pages and require the page to have focus. They do not activate while you are typing and can be changed in Settings.


Displaying two Netflix-provided subtitle tracks, selecting tracks, and adjusting subtitle appearance are free. Sentence-by-sentence practice, slow listening, looping, pausing after each sentence, the extension’s playback shortcuts, online word lookup, and pronunciation are paid VIP features, with a time-limited daily trial available.

You can manually start one 15-minute trial each day. The timer runs continuously from the moment you click to start. Pausing playback, switching tabs, or closing the page does not stop the timer. Trials and online services are subject to usage limits and anti-abuse controls. During the trial, look up text by clicking or manually selecting it.

You do not need to create a password-based account for this extension. When you first start a trial or link a VIP code, a system-generated device identity is created as required for the service. Manage your active VIP access in the Membership Center. You can use your VIP code to restore access after reinstalling the extension or on another device. Each VIP membership supports up to two registered devices, with VIP access limited to one device at a time.

Online purchases are not currently open to the public. You can use free dual subtitles, start a daily trial, or enter a valid VIP code you already have. Once purchases become available, the plans, prices, and payment methods shown in the Membership Center and on the checkout page will apply.


The full interface currently supports English, Simplified Chinese, Traditional Chinese, Japanese, Korean, Spanish, and Brazilian Portuguese. The interface language, subtitle languages, and lookup target language are configured separately. The number of languages available for the store listing does not indicate how many languages are fully supported in the interface.

You must have your own authorized access to Netflix. Available subtitle languages depend on the title and the subtitle tracks currently available. The extension does not generate subtitles for missing languages.

Sentence-by-sentence practice follows subtitle segment timings. When a complete subtitle timeline is unavailable and subtitle timing can only be recorded in real time, seeking accuracy and end-of-sentence timing may be limited. AI-generated explanations, translations, and phonetic transcriptions may contain errors; check them against the context. Online word lookup and pronunciation require an internet connection, and speech availability depends on language and voice support.


Subtitle display and preference settings are handled locally in your browser. When you use online word lookup or pronunciation, the selected text, language settings, and necessary authentication information are sent to our service. The selected text and language information are processed by the relevant translation or speech service provider. Authentication information is used for verification by our own service.

Trials, memberships, and payments each involve the data necessary for those functions. See the Privacy Policy for details on how data is used, how long it is retained, and how it can be deleted. This does not mean that all features work offline.

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This product is independently provided by Dooo5 and is not affiliated with, sponsored by, or officially endorsed by Netflix or Google.