Tutorial: Build a Node.js CLI Tool for Text-to-Speech Using FlowSpeech API

A new developer tutorial on DEV Community walks through building a command-line text-to-speech tool using Node.js 20 and the FlowSpeech public API. The tool accepts text as a command-line argument, sends an authenticated synthesis request, and saves the resulting audio file to disk. It handles multiple audio formats, including converting raw 16-bit PCM data into a standard WAV container when needed. The guide emphasizes security best practices, such as storing API credentials in environment variables rather than hardcoding them in source files. Only Node.js built-in modules are required, making the setup lightweight and dependency-free.