Real-Time Translation
Your Data Stays Local
Video and audio are processed on your own computer instead of being uploaded to a cloud AI service.
Real-Time Subtitles
Capture system audio and generate translated subtitles while you watch videos, streams and other content.
Buy Once, Use It
No monthly AI bill and no recurring subscription. Get the lifetime license for $19.
Translate the content you actually want to watch.
Understand videos when captions are missing or existing translations are unavailable.
Use downloaded content when Wi-Fi is unavailable, including planes and offline locations.
Keep confidential recordings on your own machine instead of sending them to a cloud service.
Three steps. One local workflow.
Listen to the audio
NexSub captures the audio output from your Windows system while you play the content.
Transcribe with local AI
Speech recognition runs locally using the AI models bundled with NexSub.
Show translated subtitles
The translated result appears as subtitles while you continue watching.
100+ Languages
Powered by local AI models
NexSub is designed for multilingual video content, covering major world languages and a broad range of regional languages and accents.
Built for NVIDIA GPUs
Windows 10/11 with an NVIDIA dedicated GPU is required according to the current product specification.
See NexSub on Your Desktop
Powerful AI. No Cloud Required.
Download NexSub for free, experience local real-time translation, and upgrade to the lifetime license when you're ready.