320 kbps is near-CD quality and the right pick for music you'll listen to on good headphones or speakers. A typical four-minute song lands around 9 MB.
192 kbps is the sweet spot for most people — clearly better than streaming quality on a phone, at roughly half the file size.
128 kbps is ideal for spoken-word content like podcasts, interviews and audiobooks, where the extra bitrate adds size without adding clarity.
Bear in mind that MP3 conversion can never add detail that wasn't in the original upload. If a video was published with low-quality audio, a 320 kbps export will be larger but won't sound better. Our converter always pulls the highest-quality audio stream YouTube offers before encoding.