Youtube-mp3-downloader Npm

// Express route: GET /download/:id
app.get("/download/:id", async (req, res) => 
  const id = req.params.id;
  // Optionally validate/authorize request
  const downloader = new YoutubeMp3Downloader( outputPath: "./temp", ffmpegPath: "/usr/bin/ffmpeg" );
  downloader.on("finished", (err, data) => 
    if (err)  res.status(500).send("Error"); return; 
    res.download(data.file, `$id.mp3`, () => 
      // cleanup file after sending
      fs.unlinkSync(data.file);
    );
  );
  downloader.on("error", (e) => res.status(500).send("Download failed"));
  downloader.download(id);
);

⚠️ Legal considerations:

⚠️ Limitations:

npm install youtube-mp3-downloader

Create a command-line interface using yargs: youtube-mp3-downloader npm

npm install yargs

#!/usr/bin/env node
const yargs = require("yargs");
const YoutubeMp3Downloader = require("youtube-mp3-downloader");
const argv = yargs
.option("url",  alias: "u", demandOption: true, type: "string" )
.option("out",  alias: "o", type: "string", default: "./downloads" )
.argv;
const videoId = new URL(argv.url).searchParams.get("v");
const YD = new YoutubeMp3Downloader(
ffmpegPath: require("ffmpeg-static"),
outputPath: argv.out,
youtubeVideoQuality: "highestaudio",
); // Express route: GET /download/:id
app
YD.download(videoId);
YD.on("finished", () => console.log("Download complete!"));

Run with:

node cli.js --url https://youtu.be/abc123