Convert audio to MP3 without uploading it
Audio files are often the most personal files people convert - voice memos, recorded meetings, interviews, demos. Uploading those to a random converter site is exactly backwards. This tool decodes your audio with your browser's built-in engine and re-encodes it to MP3 on your own machine. Nothing is transmitted.
What it can convert
Anything your browser can play: WAV, M4A/AAC (iPhone voice memos), OGG, FLAC, MP4 and WebM video (the audio track is extracted automatically). Output is standard MP3 that plays everywhere.
Which bitrate should I pick?
- 128 kbps - spoken word: voice memos, meetings, podcasts. Small files, perfectly clear speech.
- 192 kbps - music that needs to sound good without being huge. The sweet spot for most uses.
- 320 kbps - maximum MP3 quality. Note: converting from a lossy file (M4A/OGG) can't add quality back - it only preserves what's there.
FAQ
Does this Audio to MP3 tool upload files to a server?
- No. Decoding and MP3 encoding both happen locally in your browser.
Can I extract MP3 audio from a video?
- Yes - drop an MP4 or WebM and the audio track is converted to MP3.
Is there a file length limit?
- No fixed limit. Decoding holds the uncompressed audio in memory, so multi-hour recordings on a low-RAM device may fail - split very long files first.
Why MP3 and not AAC or Opus?
- MP3 plays on literally everything made in the last 25 years. That universality is usually the whole reason for converting.