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Record audio in the browser, transcribe on-device with Whisper, and clean the output with an LLM pipeline you control. No cloud STT bill, no audio leaving the user machine.
Message a mentor about fit, prerequisites, or where to start. Replies come on WhatsApp, usually within a day.
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Record audio in-browser, transcribe locally with Whisper, and clean output with LLM post-processing pipelines. Build an offline-first voice AI app with React, FastAPI, and faster-whisper.
Record audio in the browser, transcribe locally with Whisper, and clean output with an LLM pipeline.
What you'll ship
What you'll learn
Curriculum
Offline-first voice AI
Understand why local Whisper beats cloud STT and map the full-stack architecture you will build
Browser recording
Capture microphone audio with MediaRecorder and upload it as multipart form data
Local Whisper transcription
Load faster-whisper, accept multipart uploads on the backend, and return transcripts
LLM post-processing
Clean raw transcripts with an OpenAI-compatible LLM and support provider swapping
UX polish and ship
Expose system prompts in the UI, add copy-to-clipboard, and ship the app
Who it's for
who want to add voice input to their apps without locking into a cloud STT vendor
tired of paying per-minute transcription fees when their laptop can run Whisper locally
who need audio to stay on the user machine and never hit a third-party server
FAQ
No. faster-whisper auto-detects your hardware and falls back to CPU. The base.en model runs comfortably on CPU for near-real-time transcription on most laptops.
Any OpenAI-compatible API. The workshop shows OpenRouter, Ollama, and LM Studio side by side. You pick by changing three environment variables.
The transcription step runs fully offline once the Whisper model is cached. The LLM cleanup step is optional. Point it at a local Ollama instance and the whole pipeline stays on your machine.
Web Speech API quality is inconsistent across browsers, often requires an internet round trip, and gives you no control over the model. Local Whisper is faster, more accurate, and portable.
Pricing
Subscribe to Pro for every paid course, or buy just this one.
Unlock this course and every paid course plus workshop replays. One subscription.
You save 54% with regional pricing
One-time purchase. Lifetime access to every lesson, exercise, and update.
You save 41% with regional pricing
Still deciding? Ask Param a question
Local voice AI is the future of private, affordable audio features. Start here.
Local Voice Transcription with Whisper and LLM Post-Processing
$29 one-time