Increase the volume of your M4A file here

Why increase your M4A volume?

If you use an iPhone, there's a good chance you've got M4A files on your device without even realising. M4A is the default format for voice memos on iOS, and it's also widely used for music and audiobooks across Apple's ecosystem. The trouble is that many of these recordings end up quieter than you'd expect. A voice memo captured from the back of a meeting room or a phone interview where one person sat further from the mic can be frustratingly difficult to hear on playback.

Zamzar's volume increase tool gives you a straightforward way to make your M4A files louder without installing any audio editing software. You upload the file, select your preferred boost level (125%, 150%, 200%, or 300%), and download the adjusted version. Audiobook listeners often find this helpful when a narrator's voice sits too low for comfortable listening during a commute or in a noisy environment. It's also useful for musicians reviewing rough demos, or for anyone who's been sent an M4A voice note that's too quiet to make out without headphones. A quick volume boost can save you the trouble of asking someone to re-record something or fiddling with equaliser settings in another app.