AAC/M4A editing
Free Online AAC & M4A Editor
Edit AAC and M4A audio files in your browser. Trim AAC recordings, merge M4A files, convert AAC to MP3 or WAV, and add effects. Free online AAC editor for Apple audio, voice memos, and iTunes files.
AAC and M4A files stay on your device and are never uploaded.
Powered by FFmpeg WebAssembly for reliable AAC/M4A processing.
All editing happens locally in your browser — no upload queue.
AAC editing options
How to edit AAC and M4A files online
- 1.Upload your AAC or M4A file. The browser reads its duration, sample rate, and codec details automatically.
- 2.Choose your editing action — trim AAC audio, merge M4A files, adjust volume, change speed, or convert to MP3 or WAV.
- 3.Process the AAC file locally in the browser, preview the result, and download the edited file in your chosen format.
Why use this AAC editor?
Native AAC and M4A support
Open and edit AAC and M4A files directly without converting first. Perfect for Apple Voice Memos, iTunes downloads, and iPhone recordings.
Edit M4A files from Apple devices
M4A is the standard audio format on iPhones, iPads, and Macs. Edit these files directly instead of converting back and forth.
Private AAC processing
Your AAC and M4A files are processed in the browser. Voice memos and personal recordings never leave your device.
Convert AAC to MP3 or WAV
Need wider compatibility? Convert AAC and M4A files to MP3 for universal playback or WAV for lossless editing.
Common use cases
- •Trim an iPhone Voice Memo (M4A) to remove unwanted sections before sharing.
- •Convert AAC files from iTunes or Apple Music to MP3 for playback on non-Apple devices.
- •Merge multiple M4A recordings from a meeting or interview into a single file.
- •Adjust volume on an AAC podcast recording before publishing.
- •Convert M4A voice memos to WAV for use in a video editing project.
Tips for better results
- ✓M4A and AAC are closely related. M4A is an MPEG-4 container with AAC audio. This editor handles both seamlessly.
- ✓When converting AAC to MP3, use 192 kbps or higher to minimize quality loss from the transcoding.
- ✓If you need to do multiple rounds of editing, export as WAV between steps to avoid stacking lossy compression from repeated AAC or MP3 encoding.
AAC editor FAQ
What is the difference between AAC and M4A?
AAC is the audio codec, while M4A is the file container. An M4A file contains AAC-encoded audio inside an MPEG-4 container. In practice, they are the same thing — this editor handles both.
Can I edit iPhone Voice Memos with this tool?
Yes. iPhone Voice Memos are saved as M4A files with AAC audio. Upload them directly and trim, merge, or convert as needed.
Is my AAC file uploaded to a server?
No. All AAC and M4A processing happens locally in your browser using FFmpeg WebAssembly. Your files stay on your device.
Is AAC better quality than MP3?
At the same bitrate, AAC generally provides better audio quality than MP3 because it uses more advanced compression. However, MP3 has wider compatibility across devices and software.