Voxylio
Voxylio 1.8.4 is live on Chrome and Firefox

Watch any video in your language

Voxylio is a browser extension that dubs subtitled videos in real time. It rebuilds full sentences from the captions, translates them locally, and speaks over the video — in sync with playback.

Add to Chrome
See how it works
  • Free on the big platforms
  • Local-first
  • No credit card
  • 70+ languages

Works on videos whose player exposes a subtitle track — most course platforms do.

The demo switches from the original English audio to synchronized French dubbing and continues without silent gaps.

Built like a real dubbing studio

Not a robotic caption reader. Voxylio reconstructs sentences, keeps one consistent voice, and adapts its pace to the speaker.

Full-sentence dubbing

Caption fragments are merged into complete sentences before translation, so the voice flows naturally and translations keep their context.

We’re gonna be doing thisby using a playground.Nous allons faire cela en utilisant un playground.

Local translation

Uses Chrome's built-in on-device translation API first — free, private and offline-friendly — with an online fallback when unavailable.

Always in sync

Speech follows the video clock: pause, seek or replay and the voice follows instantly. Gentle rate adaptation keeps long sentences intelligible.

One consistent voice

A single voice is picked per session for coherence. Choose any installed system voice, including premium natural voices on macOS.

Floating controls

A draggable on-page controller lets you toggle dubbing, switch language, adjust speed and duck the original audio without leaving the video.

65+ languages

Dub any subtitled video into 65+ languages — French, Spanish, Japanese, Arabic, Hindi and more. Switching languages mid-video is instant and never mixes voices.

FRESITDEPT

How it works

Once the extension is installed, everything happens on its own:

  1. 1

    Detects the video

    The extension finds the video player on the page — even inside shadow DOM players like Mux — and reads its English subtitle track.

  2. 2

    Translates ahead

    Upcoming sentences are translated ahead of playback with Chrome's local translation model, cached per language.

  3. 3

    Speaks over the video

    A synthesized voice speaks each sentence at the right moment while the original audio is automatically lowered.

Try it — every control on this popup actually works →

Voxylio
✓ 1 video detected✓ 42 lines readyTranslation: Chrome (local)
×1.10
12 %

Play the video, then flip the switch: the voice follows the subtitles in the chosen language. At 0%, only the dub is audible.

0+ languages, in both directions

The source language is auto-detected — dub from any language into yours.

  • en

    English

    English

  • zh

    中文

    Chinese

  • hi

    हिन्दी

    Hindi

  • es

    Español

    Spanish

  • fr

    Français

    French

  • ar

    العربية

    Arabic

  • bn

    বাংলা

    Bangla

  • pt

    Português

    Portuguese

  • ru

    Русский

    Russian

  • ur

    اردو

    Urdu

  • id

    Bahasa Indonesia

    Indonesian

  • de

    Deutsch

    German

  • ja

    日本語

    Japanese

  • ko

    한국어

    Korean

  • vi

    Tiếng Việt

    Vietnamese

  • tr

    Türkçe

    Turkish

  • it

    Italiano

    Italian

  • fa

    فارسی

    Persian

  • pl

    Polski

    Polish

  • uk

    Українська

    Ukrainian

  • nl

    Nederlands

    Dutch

  • th

    ไทย

    Thai

  • sv

    Svenska

    Swedish

  • ro

    Română

    Romanian

  • el

    Ελληνικά

    Greek

  • cs

    Čeština

    Czech

  • he

    עברית

    Hebrew

  • hu

    Magyar

    Hungarian

  • da

    Dansk

    Danish

  • fi

    Suomi

    Finnish

Voxylio Blog

Latest articles

Voxylio Blog

Why subtitle-based dubbing wins

Other tools capture your tab's audio, run speech recognition in the cloud, and bill by the hour. Voxylio reads the official subtitles instead.

Voxylio
Audio-capture tools
Price
Accuracy
Privacy
Synchronization
Coverage

Comparison with audio-capture dubbing extensions, based on their public pricing and documentation.

Simple, honest pricing

Try everything free for 3 days. Then choose free local dubbing, Pro with AI, or permanent local access.

Choose your Pro billing cycle

Recommended

For every supported site + AI

Pro

Every site + the cloud features

$5.83/month

$69.99 charged today for 12 months — save $49.89 versus monthly.

Go Pro

What is included

  • Every site the engine supports — course platforms included
  • Context-aware AI translation (beta), more faithful — generous monthly allowance
  • Natural neural voices in 7 languages — local voice takes over elsewhere
  • Early access to new languages and platforms
  • Priority support
  • One account across all your browsers
  • No-subtitle dubbing (beta): live transcription + dubbing when a video has no captions at all — 60 min/month

Monthly allowance: 1,500,000 characters of AI translation + 100,000 characters of neural speech — then the local engine takes over automatically. No-subtitle dubbing (beta): 60 min of Premium Audio.

Pay once

For permanent local access

Lifetime Local

Every supported site with local voices, forever — plus 12 months of AI features.

$199one-time

$50 launch discount for the first 100 purchases

Get Lifetime

What is included

  • Every supported site with local voices, forever
  • 65+ dubbing languages, source auto-detected
  • Translated subtitles right on the video
  • One account across all your browsers
  • The first 12 months of AI features included
  • Optional AI Pass afterwards at the $19.99/year launch price

After year one, AI is optional at the current $19.99/year launch price. Local dubbing stays yours.

For the major platforms

Free

The big platforms, with a free account

$0forever

No card. No expiry. A free account is required.

Install the extension

What is included

  • 3-day full trial — every site unlocked, no card
  • Unlimited on-device dubbing on YouTube, Netflix, Prime Video, Disney+ and Twitch
  • 65+ dubbing languages, source auto-detected
  • Translated subtitles right on the video
  • What you watch never leaves your device
  • Official updates through your browser store

Secure payment via Polar. VAT is handled automatically. Subscriptions can be cancelled anytime.

Install in two minutes

Pick your browser — one click to install, and updates arrive on their own.

01

Add it to your browser

One click from your browser's store — no developer mode, nothing to configure.

02

Sign in with Google

Open the popup and sign in — the free account unlocks dubbing. No card needed.

03

Play a video

Open any subtitled video and press “Start dubbing” — Voxylio speaks it in your language.

Add to ChromeAdd to EdgeAdd to Firefox

Frequently asked questions