How I built a private audio transcription tool in browser using Transformers.js

Short summary

Author built a privacy-first browser-based audio transcription tool using Whisper and Transformers.js to avoid cloud uploads. Core architecture uses Web Workers to prevent UI freezing during heavy inference; audio must be decoded to 16kHz mono before processing. Performance: tiny Whisper model transcribes at ~7x realtime, with future monetization through LLM-based cleanup.

• •Built privacy-first browser transcription using Whisper + Transformers.js
• •Web Worker threading prevents UI freeze during inference
• •Audio decoding to 16kHz mono is critical; WebGPU not production-ready for hardcoding

Generated with AI, which can make mistakes.