Compress M4A files
Upload an M4A file and shrink its size.
Quality
Upload an M4A file and shrink its size.
The tool re-encodes the AAC audio in your M4A at a lower bitrate. AAC degrades gracefully, so voice recordings in particular can drop a long way in size before sounding rough.
Voice memos that exceed messaging app limits, lecture archives accumulating on a phone, audiobook files for storage-starved devices, and recordings attached to tickets, forms, or emails with hard caps.
A long way. Speech at modest AAC bitrates remains fully intelligible; an hour of voice can land in the tens of megabytes.
Yes, some, since this is a lossy re-encode. Pick a higher setting for music and a lower one for speech.
No, compression is performed locally by your browser.