Live AI Subtitles for Any Video on Mac.
100% Offline & Private.
Watch foreign movies, streaming shows, YouTube videos, and international meetings with floating subtitles that appear in real time. Zero monthly subscriptions. Zero video blackouts. No internet required.
How It Works in 3 Simple Steps
No complicated setup, no virtual cables, and no browser extensions required. LocalSubtitle just works.
Play Any Video or Audio
Open whatever you want to watch or listen to — a movie in Safari, a show on Netflix, a video on YouTube, or an international Zoom call.
Instant On-Device AI
LocalSubtitle listens to your Mac's audio output without recording your screen. Advanced AI transcribes and translates speech on your Mac with zero internet connection.
Subtitles Float Magically
Crystal-clear subtitles float right over your screen in sync with the dialogue. You can even click controls or scrub video right through them.
Why You'll Love LocalSubtitle
Everything you need to enjoy international media, learn new languages, and understand conversations effortlessly.
100% Offline & Private
All speech recognition and translation run completely inside your Mac using your Apple Silicon chip. Not a single sound is ever sent over the internet or saved to external servers. Your conversations stay strictly yours.
Designed to Avoid Video Blackouts
Unlike screen-capture tools that can trigger HDCP copyright protections and blank out video windows, LocalSubtitle captures audio output directly without touching display pixels. This preserves smooth, visible playback across major streaming platforms like Netflix, Disney+, Prime Video, and Apple TV.
Bilingual Dual-Language Mode
The ultimate companion for movie lovers and language learners. LocalSubtitle displays the original spoken dialogue alongside the translated subtitles simultaneously, making language immersion effortless and natural.
Works Across Your Favorite Mac Apps
LocalSubtitle floats smoothly above your windows. Whether you are browsing in Safari or Chrome, watching video files in QuickTime or VLC, or attending international meetings in Zoom, FaceTime, or Discord, your floating subtitles remain accessible.
Ultra-Low Latency
Processes speech locally on your Mac's Apple Silicon hardware in fractions of a second, rendering captions smoothly as people speak.
Same-Language Transcription
Listening to English or Japanese content? It transcribes instantly with zero translation delay for crystal-clear clarity.
Click-Through Overlay
Subtitles float effortlessly without getting in your way. You can click play, pause, or scrub videos right through them.
Global Keyboard Shortcuts
Control subtitles from anywhere: ⌘ ⇧ T to hide or show, and ⌘ ⇧ P to pause whenever you step away.
Smart Speech Detection
Automatically filters out background music, room hum, and silence so you only see genuine speech.
Custom Subtitle Sizes
Quickly adjust subtitle size, font style, and screen placement with a single click to suit your vision.
How LocalSubtitle Compares
See why on-device translation is faster, safer, and far more convenient than traditional tools.
| Feature | LocalSubtitle | Cloud Extensions | Screen OCR Tools | Manual Subtitle Files |
|---|---|---|---|---|
| Privacy & Offline | ✓ 100% On-Device | ✗ Audio sent to cloud | ✗ Screenshots uploaded | ✓ Offline |
| Video Stays Visible | ✓ Audio tap (No screen capture) | ✗ Often blocked by DRM | ✗ May cause blackouts | ✓ Visible |
| Live Video & Calls | ✓ System-wide floating overlay | ✗ Browser only | ✗ High latency OCR | ✗ Not possible |
| Bilingual Mode | ✓ Simultaneous display | ✗ Rare / Clunky | ✗ Unsupported | ✗ Complex multi-track |
| No Subscriptions | ✓ One-time purchase | ✗ $10–$30 / month | ✗ Credit-based | Manual file hunting |
*Comparison represents general architectural differences between on-device audio capture, cloud-based extensions, screen OCR utilities, and static subtitle tracks as of October 2026.
Supported Translation Languages
Translate between the world's most widely spoken languages on your Mac.
Be the First to Know When It Launches
LocalSubtitle is launching soon exclusively on the Apple Mac App Store. Enter your email below to get an instant notification the moment it is live.
Frequently Asked Questions
We are currently finalizing the Mac App Store submission. Leave your email in the notify box above, and you'll get an immediate link as soon as the app goes live.
Many video services protect playback by blanking your screen whenever an app tries to record the display. LocalSubtitle avoids screen capture completely — it captures sound directly from your Mac's audio output so your video remains crystal clear.
No! LocalSubtitle is 100% offline. Both speech transcription and translation run directly on your Mac. You can use it on airplanes, trains, or anywhere without Wi-Fi.
LocalSubtitle supports any Apple Silicon Mac (M1, M2, M3, or M4) running macOS 15.0 Sequoia or later.
Bilingual Mode shows both the original spoken dialogue and the translated text together. This allows you to listen to natural pronunciation while immediately connecting it to the translation.
Yes. The subtitles float seamlessly without blocking your cursor. You can click play, pause, scrub the timeline, or resize the video window directly through the subtitle text.