Build a Voice-Controlled Personal Assistant Web App

Modern users prefer hands-free control over digital tasks — from setting reminders to checking weather, to sending quick notes. While smart speakers like Alexa exist, there is a need for browser-based, customizable personal assistants that work cross-device without special hardware.

Develop a React-based web application where users can interact by speaking instead of typing. The app listens, processes the intent using basic NLP techniques or third-party APIs, and executes tasks like calendar event creation, real-time answers, IoT device control, or even simple chatting.

When the user clicks the mic button or gives a wake-word command, the app listens using SpeechRecognition APIs, parses the spoken text, matches it to predefined commands (or processes it via NLP API like Dialogflow), and executes the appropriate action with real-time feedback.

• Use the browser’s SpeechRecognition API to capture voice input in real-time.
• Parse and match voice input against a set of supported commands or query external APIs for dynamic content.
• Perform actions like setting a reminder, fetching weather data, turning IoT devices ON/OFF, or responding with a text-to-speech reply.
• Maintain command history and allow users to view recent interactions in a console/log window.
• Optional: Add wake-word functionality and offline mode using Service Workers and Web Speech API offline capabilities.

• Web Speech API (SpeechRecognition and SpeechSynthesis) Documentation
• Build a Voice Recognition React App
• Using Dialogflow for Intent Recognition
• Speech Recognition in JavaScript Full Tutorial
• OpenWeatherMap API Documentation
• Building a Personal Voice Assistant with Node.js