MP3 to M4A Converter — Free, No Upload
MP3 to M4A Converter: convert audio between MP3, WAV, M4A, OGG and FLAC, or pull the sound out of a video, right in your browser.
Free, with no sign-up and no watermark. The file is processed in your browser and never uploaded.
Convert audio files between the common formats without uploading them anywhere. Drop in one file or a whole batch, choose MP3, WAV, M4A, OGG or FLAC, and set the bitrate, sample rate and channels if you need to. You can also drop a video to save just its sound — handy for turning a recorded lecture into an MP3.
Conversion streams through your browser's own audio codecs, so long files don't need to fit in memory all at once.
Step by step
- Add your files: Drag audio or video files onto the upload area, or click to browse. Add as many as you like.
- Pick the output format: Choose MP3, WAV, M4A, OGG or FLAC under Output format. Formats your browser can’t encode are hidden.
- Set quality: For MP3, M4A and OGG pick a bitrate (128 kbps is fine for speech, 192–320 kbps for music). For WAV choose 16- or 24-bit.
- Adjust sample rate or channels (optional): Leave both on Keep original unless a device or app needs, say, 44.1 kHz mono.
- Convert: Click Convert to …. One file downloads directly; several come as a ZIP.
Handy for
Video to MP3
Extract the soundtrack from a screen recording, lecture or interview video.
Shrink recordings
Turn large WAV or FLAC files into compact MP3 or Opus for sharing.
Editing-friendly WAV
Decode compressed audio into 24-bit WAV for audio editors and DAWs.
Device compatibility
Make files an old car stereo or MP3 player can play by converting to 44.1 kHz stereo MP3.
Good to know
Converting lossy to lossy (M4A → MP3) can’t add back lost detail — choose a bitrate at least as high as the source.
Opus (OGG) gives the best quality per kilobyte, especially for speech, but not every device plays it.
MP3 supports at most two channels; surround audio is mixed down to stereo.
Need just one format pair? The WAV to MP3 and MP3 to WAV pages are presets of this tool.
Questions
Which formats can I open?
Anything your browser can decode: MP3, WAV, M4A/AAC, OGG (Vorbis and Opus), FLAC, WEBM and AIFF on most systems — and the soundtrack of MP4, MOV or WEBM videos. Very unusual codecs (for example AMR or WMA) usually can't be read.
Which formats can I save as?
MP3 and WAV always work. M4A (AAC) and OGG (Opus) depend on your browser's built-in encoders — Chrome and Edge support both; if your browser can't encode one, that option is hidden rather than failing.
Why isn't FLAC offered as an output?
FLAC output relies on a browser FLAC encoder, which many browsers don't have yet. When yours doesn't, the option is hidden. FLAC files can always be used as input.
Do I lose quality?
WAV and FLAC are lossless. MP3, M4A and OGG are lossy: at 192 kbps or more most people can't hear a difference for music; 128 kbps is plenty for speech.
Are my audio files uploaded anywhere?
No. Decoding, editing and encoding all happen inside your browser tab. Nothing is sent to a server, and closing the tab discards everything you haven't downloaded.
Further reading
- MP4 to MP3: How to Get the Audio Out of Any Video — Extract a video's sound as MP3, M4A, WAV or OGG in your browser: 192 kbps suits music, 96–128 kbps suits speech, and you can cut the clip first.
More Audio Tools tools
- WAV to MP3 — Turn large WAV recordings into compact MP3 files with the bitrate you choose.
- M4A to MP3 — Convert M4A and AAC files from iPhones, voice memos and iTunes into universally playable MP3.
- OGG to MP3 — Convert OGG, Opus and WhatsApp voice notes into MP3 files that play everywhere.
- FLAC to MP3 — Shrink lossless FLAC music into MP3 for phones, cars and older players.
- MP3 to WAV — Decode MP3 into uncompressed 16- or 24-bit WAV for editing software, CDs and samplers.
- Audio Cutter & Ringtone Maker — Select part of a song on its waveform, add fades and save it as a clip or a phone ringtone.