M4A to MP3
Turn an M4A recording into a downloadable MP3, without uploading it.
Files stay on your device. Nothing is uploaded.
One M4A · up to 400 MB · AAC audio up to 30 minutes
MP3 is lossy. Higher bitrate makes a larger file; it does not restore missing detail.
Related tools
A voice memo or an audio export may arrive as M4A when the person receiving it needs MP3. Choose your recording, select a bitrate and convert it here. The original stays unchanged; the result is a separate MP3 file. Processing takes place on your device after you press Convert, not on a conversion server. Keep the tab open until the download is ready. This version handles AAC audio in an M4A container. Lossless ALAC recordings and protected purchases are not supported.
How to use
- Choose one M4A recording from your device.
- Select 128, 192 or 320 kbps; start with 192 if you are unsure.
- Press Convert to MP3 and keep the tab open. Cancel stops processing.
- Download the MP3 and listen to it before sharing it or deleting the original.
What it handles
- One file at a time, up to 400 MB and 30 minutes of audio.
- AAC input with one or two channels at 32, 44.1 or 48 kHz; unsupported codecs fail visibly.
- 128, 192 or 320 kbps MP3 output, preserving mono or stereo.
- Progress and cancellation, without saving audio in browser storage.
- Creates encoded audio without copying title tags, cover artwork or other metadata.
FAQ
Can I convert an iPhone Voice Memo to MP3?
Yes, when the exported M4A contains supported AAC audio. Save or share the recording as a file first, then choose it here. A lossless recording may use ALAC instead and will not work in this version. The filename alone does not identify the codec. Keep the original and listen to the downloaded MP3 before sending it.
Does changing .m4a to .mp3 convert the recording?
No. Changing the filename does not change the container or audio data. A player that expects MP3 may still reject the renamed file. This tool decodes the supported AAC recording and encodes new MP3 audio. That is a lossy conversion, so even a high output bitrate cannot recover detail already absent from the source.
What limits apply, and is my audio uploaded?
One file up to 400 MB and 30 minutes is accepted. Processing stops after ten minutes if it has not finished. The recording stays on your device; no conversion server receives it. Browser codec support and available memory can still cause failure within these limits. Use a computer for large files and keep this tab open.
Which bitrate should I choose?
Start with 192 kbps, then listen to the result. For speech, 128 kbps may give a smaller file with acceptable sound. The 320 kbps option produces a larger download but cannot restore information lost in the M4A source. Mono and stereo are kept; tags and artwork are not copied. Keep your source if editing quality matters.
Updated