Privacy-first subtitle generation
AccurateSRTsubtitlesfromvideo
Extract audio in your browser, transcribe with your own Gemini key, and download timestamped SRT files in minutes.
Free to use. Bring your own Gemini API key.
BUILT WITH TRUSTED TECHNOLOGY
Problem
Manual subtitles shouldn't slow you down.
Solution
Subtitles built for creators who care about speed and privacy
Generic cloud upload tools aren't enough. SubGenAI is purpose-built for accurate SRT generation with browser-side processing and your own Gemini key.
In-browser audio extraction
ffmpeg.wasm runs locally to pull audio from your video — your full file never leaves your device.
Gemini-powered transcription
Your own Google Gemini API key drives fast, accurate speech-to-text with precise SRT timestamps.
Privacy-first workflow
Only extracted audio is sent for transcription. Video processing stays on your machine.
Encrypted BYOK storage
Your Gemini API key is encrypted with AES-256-GCM before storage and never returned to the browser.
How it works
Just 3 steps to get started
Testimonial Highlight
What creators are saying
SubGenAI cut my caption workflow from hours to minutes. Browser-side processing means I never worry about uploading raw footage.
Jordan Lee
The SRT timestamps are accurate enough to drop straight into my NLE. BYOK keeps costs predictable for client projects.
Priya Sharma
Finally a subtitle tool that respects privacy. Audio extraction happens locally and I control my own Gemini key.
Marcus Chen
Features
Get production-ready subtitles
Testimonials
What our users are saying
SubGenAI cut my caption workflow from hours to minutes. Browser-side processing means I never worry about uploading raw footage.
Jordan Lee
YouTube creator
The SRT timestamps are accurate enough to drop straight into my NLE. BYOK keeps costs predictable for client projects.
Priya Sharma
Documentary editor
Finally a subtitle tool that respects privacy. Audio extraction happens locally and I control my own Gemini key.
Marcus Chen
Indie filmmaker
SubGenAI cut my caption workflow from hours to minutes. Browser-side processing means I never worry about uploading raw footage.
Jordan Lee
YouTube creator
The SRT timestamps are accurate enough to drop straight into my NLE. BYOK keeps costs predictable for client projects.
Priya Sharma
Documentary editor
Finally a subtitle tool that respects privacy. Audio extraction happens locally and I control my own Gemini key.
Marcus Chen
Indie filmmaker
SubGenAI cut my caption workflow from hours to minutes. Browser-side processing means I never worry about uploading raw footage.
Jordan Lee
YouTube creator
The SRT timestamps are accurate enough to drop straight into my NLE. BYOK keeps costs predictable for client projects.
Priya Sharma
Documentary editor
Finally a subtitle tool that respects privacy. Audio extraction happens locally and I control my own Gemini key.
Marcus Chen
Indie filmmaker
SubGenAI cut my caption workflow from hours to minutes. Browser-side processing means I never worry about uploading raw footage.
Jordan Lee
YouTube creator
The SRT timestamps are accurate enough to drop straight into my NLE. BYOK keeps costs predictable for client projects.
Priya Sharma
Documentary editor
Finally a subtitle tool that respects privacy. Audio extraction happens locally and I control my own Gemini key.
Marcus Chen
Indie filmmaker
Batch exporting SRT for multiple episodes used to be painful. SubGenAI makes it straightforward with clean timestamps.
Elena Rossi
Podcast producer
Students need accessible captions. This tool fits my workflow without sending course footage to unknown servers.
David Okonkwo
Course creator
Short-form clips need fast captions. I generate SRT in minutes and import directly into my editor.
Sarah Kim
Social media manager
Batch exporting SRT for multiple episodes used to be painful. SubGenAI makes it straightforward with clean timestamps.
Elena Rossi
Podcast producer
Students need accessible captions. This tool fits my workflow without sending course footage to unknown servers.
David Okonkwo
Course creator
Short-form clips need fast captions. I generate SRT in minutes and import directly into my editor.
Sarah Kim
Social media manager
Batch exporting SRT for multiple episodes used to be painful. SubGenAI makes it straightforward with clean timestamps.
Elena Rossi
Podcast producer
Students need accessible captions. This tool fits my workflow without sending course footage to unknown servers.
David Okonkwo
Course creator
Short-form clips need fast captions. I generate SRT in minutes and import directly into my editor.
Sarah Kim
Social media manager
Batch exporting SRT for multiple episodes used to be painful. SubGenAI makes it straightforward with clean timestamps.
Elena Rossi
Podcast producer
Students need accessible captions. This tool fits my workflow without sending course footage to unknown servers.
David Okonkwo
Course creator
Short-form clips need fast captions. I generate SRT in minutes and import directly into my editor.
Sarah Kim
Social media manager
Bring your own key
Free to use
SubGenAI has no subscription. Connect your Gemini API key and pay only for the transcription requests you run through Google AI Studio.
$0
SubGenAI subscription — pay Google for API usage only
- No SubGenAI subscription or usage fees
- Transparent billing through your Google account
- API keys encrypted with AES-256-GCM before storage
- Remove or rotate your key anytime in Settings