Dual Subtitles for Netflix (N2)

Free dual subtitles on Netflix — two languages at once, for language learning. Hover-a-word dictionary, search, replay, export.

Two subtitle languages on Netflix, on screen at once — free, no limits, and private. WHAT YOU GET • Two languages at the same time, each timed to the video — pick a primary and a secondary • Hover any subtitle word for its meaning, base form and how common it is — no leaving the player (beta) • Skip back one line at a time, not 10 seconds; loop a phrase between two marks (A–B) • Hide a language, listen, then show it; hear a line twice; auto-pause at the end of each line • Search the whole episode for a word or grammar pattern and jump straight to it • Save searches — they light up in the subtitles as you watch, each in its own colour • Play only the lines you searched for, each repeated the way you set, then carry on • Picture-in-Picture: pop the subtitles — and, if you like, the video — out into a small always-on-top window that stays with you in other tabs and apps • Read the episode as a transcript, copy any word, export SRT or a dual-language ASS • Style each language — size, colour, outline, background, a dyslexia-friendly font • Playback speed 0.25× to 4× · interface in 32 languages • Runs on your device — no account, no ads, no tracking, no limits Whether you're learning a language or watching with someone who reads a different one, both lines show together, each timed to the video. Pick a primary and a secondary; the second even defaults to what's actually being spoken. Here is each of those in more detail: LEARN, DON'T JUST WATCH Missed a line? Jump back a line at a time — no more 10-second skips. Loop a phrase, auto-pause at the end of each line, or hide one language and show it only after you've listened. Ready-made setups (Hear it twice, Listening practice, Learning, Casual co-watch) put those together for you, and you can save your own under a name. LOOK UP A WORD WITHOUT LEAVING THE PLAYER (BETA) Hover any subtitle word — or type one into the "Look up any word" box in the panel or the toolbar popup — and a word card explains it: the base form and how the word is conjugated (먹었어요 → 먹다, past · polite), the meanings, a learner level and how common the word is in film and TV, hanja with the meaning of each character, usage notes such as polite, slang or regional, and any idiom it spots around the word in the line ("a crock of shit" when you hover "crock"). Korean ↔ English and English → English are built in; Japanese, Chinese, Spanish, French, German, Italian, Portuguese and Russian → English, Japanese → Japanese, Korean → Korean and a few small packs explaining Japanese, Chinese and Spanish words in Korean can be downloaded, along with the National Institute of Korean Language's learner's dictionary and the full standard dictionary. For any other language the card gives you dictionary-site links — and, if you switch them on, Chrome's on-device translation of the word in its line, an online lookup (Japanese words go to jotoba.de), and, as a separate last resort, Google Translate. Click a word to pin the card, select a word in the card (or ⌘/Ctrl-click it) to look that one up too with a trail to step back, press Shift to flip the explanation language, open Naver or Wiktionary inside the panel, and it all works in the transcript and the pop-out window too. Everything reads from dictionaries stored on your device. Optional extras you switch on yourself: look a missing word up online, translate the word in its line with Chrome's built-in on-device translator, or bring your own DeepL or AI key. It is new, so every card has a "Report an error" link. STUDY THE GRAMMAR YOU CARE ABOUT Search any word or pattern across the whole episode and jump straight to it — it even finds fused Korean endings. Save the patterns you're learning and they light up, each in its own colour, right in the subtitles as you watch. Then press "Play only these lines": only the matching lines play, each hidden then shown or however you set it, and the rest of the episode is skipped. Go through the set once, a few times, or until you stop. MAKE IT YOURS Per-language colours, sizes and fonts (a dyslexia-friendly one included), plus outline, background and a window box — big and bold, or small and tucked out of the way. On a big screen they grow with the video, the way Netflix's own subtitles do, and you can go up to 60 px if you want them larger still. Subtitles even follow Netflix's own positioning, moving to the top when a line belongs there. TAKE THE WORDS WITH YOU Click or drag to copy a word or phrase. Read the whole episode as a transcript. Export one language as .srt, a merged file, or a dual-language .ass that keeps each language's exact timing. KEEP READING FROM ANY TAB (PICTURE-IN-PICTURE) Pop the subtitles out into a small always-on-top Picture-in-Picture window — both languages stay in view while you browse other tabs or apps, with play/pause, line-replay and episode buttons right in the window. It can even open by itself when you leave the Netflix tab (optional, Spotify-style) and, experimentally, show the video picture too. Plus: playback speed up to 4×, A–B marks drawn right on Netflix's progress bar, the transcript in its own window beside the video, settings backup, a one-tap off switch, and the whole interface in 32 languages. WHY IT'S DIFFERENT • Free, with no limits — every feature, every title, as much as you like. No ads, no subscription, no in-app purchases, no sponsored content. • Real subtitles, not machine translation — both languages are Netflix's own professional subtitles, so the text and timing are accurate. • Private by design — runs entirely on your device. No login, no servers, no tracking; settings stay in your browser. ABOUT TRANSLATION Both languages are Netflix's own professional subtitles for that title — not machine translation, which is fast but often inaccurate or subtly wrong, the opposite of what you want when learning. The honest trade-off: you can only pair languages Netflix actually offers for a given title. If there's enough interest, a higher-quality translation option may come later — done properly, not bolted on cheaply. PRIVACY Runs locally and collects nothing automatically — no analytics, tracking, or ads. A small counter of how many days you've used it stays on your device (to time a one-time feedback prompt) and is never sent. Word lookup reads dictionaries stored on your device; only if you switch on one of its extras does anything leave, and then only what that extra needs: the hovered word to two Wiktionary-based sites (online lookup), or the word and its line to the provider you chose with your own key. Chrome's built-in translator runs on your device. Beyond that, the only data that leaves is what you type into the optional feedback form, the word card's "Report an error" note, or the short optional feedback page shown if you uninstall — all via Web3Forms, and only when you press send. See the privacy policy for details. TRY IT LIVE Play with the on-screen subtitle settings (font, size, outline, background, position) in your browser, no install needed: https://netflix-dual-subs.pages.dev/demo THE FULL TOUR A guide that explains every control, with short clips: https://netflix-dual-subs.pages.dev/guide CHANGELOG See what's new in each version: https://netflix-dual-subs.pages.dev/changelog ON THE ROADMAP Ideas being explored (no promises on timing): a subtitle timing offset, more dictionary languages and packs, and whole-series search. DON'T SEE YOUR USE CASE? Tell me what you're trying to do — the feedback button in the popup — and I'll see if I can add it. This is shaped by the people who use it. FROM THE DEVELOPER I built this because I wanted it myself: two subtitle languages on Netflix, in a clean, simple interface that stays out of the way. Hence the name on the little red button — N², "N squared": Netflix × 2 languages. It's a one-person project, made and maintained in my spare time — and made with care: the core features are covered by automated tests (including end-to-end tests in a real browser) so updates don't quietly break things. But one person can't catch everything. If something breaks, or a feature behaves in a way that feels wrong to you, please tell me with the feedback button — I read every message and will look into it. Let's make it a better extension together. SUPPORT Free, unlimited, and ad-free. If it helps your learning or watching, you can support development here: https://ko-fi.com/n2dualsubtitles NOTE Unofficial extension, not affiliated with or endorsed by Netflix. Because it builds on how Netflix's player works, a Netflix change may occasionally require an update — the popup shows a status line that tells you when a Netflix change is the cause, so you know to update (or to report the video with the built-in feedback button) rather than wondering what went wrong. CREDITS The dyslexia-friendly font option uses OpenDyslexic by Abbie Gonzalez, licensed under the SIL Open Font License 1.1 (bundled as fonts/OFL.txt).