Convert MP3 to M4A online. MP3 and M4A both use lossy compression. Free batch processing with no signup or watermark.
Drop or click to add one or more audio files
Add one or more MP3 files. You can review the complete batch before processing it.
M4A is already selected for this page. Add multiple audio files and use the available codec, trim, volume, fade and reverse controls.
Start the batch, then download and check the finished M4A file or files.
MP3 and M4A both use lossy compression. Re-encoding may introduce a small additional quality loss, especially in audio that has already been compressed several times.
MP3 is the world’s most popular audio format. Its lossy compression shrinks music and audio to a fraction of the original size while keeping quality good enough for almost any use, which is why it plays on virtually every device and app.
MP3 plays everywhere - any music app, browser, phone, car stereo, and the default player on Windows, macOS, Android and iOS.
M4A is an audio format that usually holds AAC-encoded sound in an MP4 container. It is Apple’s standard for music downloads and voice memos, offering great quality at small sizes and playing natively across the Apple ecosystem.
M4A plays in Apple Music/iTunes, QuickTime, VLC and most modern media players; on older devices, convert it to MP3.
ToolSpice can convert your MP3 files to these other formats:
These other formats can be converted to M4A on ToolSpice: