Aurora Subtitles
Beta — Now Available for Testing

Aurora Subtitles

Real-time AI Translation

Real-time AI-powered subtitle translation for Windows. Break language barriers with local, private, GPU-accelerated transcription and translation.

Buy Explore Features
100% Local Processing
Windows 10/11
GPU Accelerated

Powerful Features

Everything you need for real-time subtitle translation, running entirely on your machine.

Real-time Subtitles

From speech to subtitle in 300-800ms. Capture system audio or microphone with WASAPI — no virtual cables needed.

100% Private

All processing happens locally on your PC. No cloud, no subscriptions, no data ever leaves your machine.

200+ Languages

Powered by Meta's NLLB model. Translate between hundreds of language pairs with remarkable accuracy.

GPU Acceleration

NVIDIA CUDA support for up to 70% faster transcription. Falls back gracefully to CPU when no GPU is available.

Smart Overlay

Transparent, customizable, click-through subtitle window. Adjust fonts, colors, position & opacity to your taste.

Flexible AI Models

Choose from 6 Whisper models — from ultra-fast Tiny (43MB) to high-accuracy Large-V3-Turbo (574MB). Auto-download included.

See It In Action

Aurora Subtitles displays translated captions as a sleek overlay on your screen — minimal and non-intrusive.

Aurora Subtitles

How It Works

1

Install & Choose Model

Download Aurora Subtitles and select a Whisper model based on your hardware. Models download automatically with one click.

2

Configure Languages

Select source and target languages. Add context prompts for technical vocabulary or specific scenarios.

3

Start Subtitling

Click START or use your global hotkey. Real-time subtitles appear as a customizable overlay on your screen.

Built For Everyone

Gamers

Understand voice chat in any language with transparent, click-through subtitles that won't disrupt gameplay.

Content Creators

Follow international streams, podcasts and videos with instant translated subtitles on screen.

Professionals

Navigate multilingual meetings and video conferences with real-time captions and translations.

Students

Access lectures and educational content in any language with AI-powered subtitle accuracy.

Podcasts

Listen to your favorite podcasts in any language with real-time subtitles.

Meetings

Understand every word in Teams, Zoom, or Google Meet calls with instant translation.

Videos

Watch YouTube videos without waiting for official subtitles.

Technical Specifications

300ms

Minimum latency

200+

Supported languages

100%

Local processing

70%

Faster with GPU

Available Whisper Models

Tiny ~43 MB Fastest
Base ~82 MB Fast
Small ~264 MB Balanced
Medium ~539 MB Slow
Large-V3 ~1.1 GB Most accurate
V3-Turbo ~574 MB ★ Recommended

Everything Included

Real-time transcription & translation
100% local processing — your data never leaves your PC
GPU acceleration with CUDA support
Whisper AI models (Tiny to Large-V3-Turbo)
NLLB translation across 200+ languages
Customizable overlay with click-through mode
Context prompts for improved accuracy
Voice Activity Detection (Silero VAD)
Global hotkeys for instant control
System audio & microphone capture

Frequently Asked Questions

Does Aurora Subtitles require an internet connection?
No. All processing — speech recognition, translation, and subtitle display — happens entirely on your local machine. No internet connection is needed after the initial model download.
What hardware do I need?
Aurora Subtitles runs on Windows 10/11 (x64). For basic usage, any modern CPU works. For the best experience, we recommend an NVIDIA GPU with CUDA support, which provides up to 70% faster processing.
Which languages are supported?
Whisper supports dozens of input languages, and the NLLB translation model supports over 200 language pairs. You can transcribe in one language and display subtitles in another.
Is my data private?
Absolutely. Aurora Subtitles processes all audio locally on your PC. No audio, transcriptions, or translations are ever sent to any server. Your conversations remain completely private.
Early Access

Get Early Access

Join the waitlist to be among the first to try Aurora Subtitles. Get notified when we launch and receive exclusive early-bird benefits.

Buy

Secure payment via Lemon Squeezy

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Break Every Language Barrier

Aurora Subtitles is a powerful desktop application that transcribes and translates audio in real-time, displaying subtitles as a customizable overlay on your screen. Powered by OpenAI’s Whisper and Meta’s NLLB models, it processes everything locally on your machine — no cloud, no subscriptions, no data leaving your PC.

Who Is It For?

  • Gamers: Understand voice chat in any language while gaming. Subtitles appear as a transparent overlay that doesn’t interfere with gameplay.
  • Content Creators: Follow international streams, podcasts, and videos with instant translated subtitles.
  • Business Professionals: Navigate multilingual meetings and video calls effortlessly with real-time captions.
  • Students & Researchers: Access lectures and educational content in any language with AI-powered accuracy.
  • Accessibility: Provide real-time captions for hearing-impaired users in any context.

How It Works

  1. Install & Select Your Model — Choose from Whisper models ranging from ultra-fast (Tiny, ~43MB) to high-accuracy (Large-V3-Turbo, ~574MB). Models download automatically.
  2. Configure Your Languages — Select the source and target languages. Aurora Subtitles supports 200+ language pairs.
  3. Start Subtitling — Click START or use your global hotkey. Subtitles appear instantly as a sleek overlay on your screen.

Powered by Leading AI

  • OpenAI Whisper: State-of-the-art speech recognition that understands accents, technical jargon, and natural speech patterns.
  • Meta NLLB: No Language Left Behind — a translation model capable of translating between hundreds of language pairs with remarkable accuracy.
  • Silero VAD: Intelligent voice activity detection that only processes when someone is speaking, saving resources.

Complete Customization

Tailor every aspect of your subtitle experience:

  • Font family, size, color, and weight
  • Outline color and thickness for readability
  • Background color and opacity
  • Window position (top, bottom, or custom coordinates)
  • Click-through mode for uninterrupted workflow

Performance That Matters

Built with Rust and optimized for Windows:

  • Latency: 300-800ms from speech to subtitle
  • CPU Usage: 5-15% with lightweight models
  • GPU: 50-70% faster with NVIDIA CUDA
  • Memory: ~500MB with base model