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Bulk MP3 to M4A Converter Online — Free HD Quality

Drag and drop your multiple MP3 files into this free online MP3 to M4A converter (.mp3 to .m4a), and click the Convert button to bulk convert them to M4A format in HD quality. Use the quality slider to fine-tune your M4A output, then download your converted files one by one or as a single ZIP — your original MP3 files are removed from our servers right after.

To:
85%

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PNG, JPG, WebP, GIF, HEIC, RAW, PSD, SVG and more

Max 100MB per file

MP3 vs M4A — File Format Comparison

Feature MP3 M4A
File Extension .mp3 .m4a
MIME Type audio/mpeg audio/mp4
Compression Type Lossy Lossy
Metadata Support Yes Yes

What Is MP3 Format?

MPEG-1 Audio Layer III — the world's most popular compressed audio format, balancing sound quality with small file sizes for music streaming, downloads, and portable devices.

  • Compression: Lossy
  • Tags & Metadata: Supported

What Is M4A Format?

MPEG-4 Audio — AAC audio in an MP4 container, the standard format for Apple Music, iTunes purchases, and iPhone voice memos, offering better quality than MP3 at equivalent bitrates.

  • Compression: Lossy
  • Tags & Metadata: Supported

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