Compress Audio for Podcast Upload — Hit Spotify, Apple Podcasts Limits
Podcast platforms have specific bitrate sweet spots. Hit them and your show sounds clean and uploads fast. Miss them and you waste listener bandwidth or sound muddy.
Spotify, Apple Podcasts, and most RSS-based podcast distributors recommend 96-128 kbps mono or 128-160 kbps stereo for spoken-word content. Going higher wastes listener bandwidth (especially on mobile) and increases upload size. Going lower introduces audible compression artifacts in voice. This guide hits the sweet spot.
Open MP3 ConverterStep-by-step
Decide mono or stereo
Pure spoken-word: mono is plenty (smaller file, no quality difference). Music + voice or stereo sound design: stereo. Most solo and interview podcasts work great in mono.
Open the MP3 Converter
Launch the tool. Drop your master audio file in (usually a WAV or AIFF from your editing software).
Pick 96-128 kbps mono OR 128-160 kbps stereo
These are the platform sweet spots. 96kbps mono is roughly 700KB per minute — a 30-minute episode is ~21MB. Plenty for the audio quality podcast listeners expect.
Export and upload
Save the compressed MP3. Upload to your podcast host (Buzzsprout, Anchor, Libsyn, etc.). The host re-encodes anyway, so optimizing your upload helps them and saves your upload time.
Ready to try it?
Convert any audio file to MP3. Free, no signup, runs in your browser.
Open MP3 ConverterFrequently asked questions
What bitrate does Spotify recommend for podcasts?
Spotify accepts MP3 files between 96 and 320 kbps. They recommend 96-128 kbps mono or 128-160 kbps stereo for spoken-word content. Higher bitrates don't improve the listening experience for podcasts noticeably.
Should I record in MP3 or convert later?
Always record and edit in WAV (lossless). Convert to MP3 only as the final step. Editing MP3 directly causes generation loss — every edit and re-export degrades quality slightly.
Why mono for podcasts?
Voice doesn't have left/right separation — a single human speaker is essentially a mono source. Storing it as stereo doubles the file size with zero quality benefit. Most podcast players still play mono correctly through both ears.
Will lower bitrate make me sound bad?
At 96 kbps mono, voice sounds clean to virtually everyone. Below 64 kbps you start hearing audible artifacts. Above 192 kbps you're storing data nobody can hear and wasting listener bandwidth. Stay in the 96-160 range for podcasts.
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