M4A to MP3 Converter
Convert M4A voice memos and audio files to MP3. No uploads, no software.
Drop files here
or click to browse · paste from clipboard
Accepts .M4A · Up to 1,000 files
How it works
Drop your files
Drag and drop, click to browse, or paste from clipboard. Up to 1,000 files at once.
Choose settings
Adjust quality, format, and other options to match your needs.
Click Convert
Everything runs in your browser via WebAssembly. M4A to MP3 Converter happens locally — no server involved.
Download
Download files individually or grab all at once as a ZIP.
Frequently asked questions
M4A is Apple's audio format — it's an AAC audio track inside an MPEG-4 container. It plays natively on Apple devices (iPhone, Mac, iPad) and in most modern media players, but older Android apps, car stereos, and some podcast platforms expect MP3. Converting to MP3 makes the file universally compatible.
Yes, slightly — both M4A (AAC) and MP3 are lossy formats, and converting between them is a lossy-to-lossy transcode. At 192 kbps or higher, the quality difference is inaudible for most listeners. For voice memos, 128 kbps is transparent. Keep your original M4A files if you ever need to re-edit.
Yes. iPhone voice memos are saved as M4A files. Export them to your Mac or PC (via AirDrop, iCloud, or a USB cable), drop them into this tool, and download the MP3s. The conversion runs entirely in your browser — nothing is uploaded.
For voice memos, recordings, and podcasts: 128 kbps is transparent — you won't hear a difference from the original. For music: use 192–256 kbps. Use 320 kbps only if you plan to re-edit the MP3 later, since re-encoding a lossy file degrades quality further.
Yes. Drop as many M4A files as you need. ConvertYard processes them one at a time in your browser and packages all the MP3s into a single ZIP for download. There is no hard file count limit, though very large batches will take proportionally longer.
Never. Conversion runs entirely in your browser using ffmpeg.wasm — a full media processing engine compiled to WebAssembly. Your files never leave your device. ConvertYard's servers only deliver the tool code — they never see your files.