Mac owners who want to turn an MP4 video into an MP3 audio file often assume they need a special app — or a confusing trip through QuickTime or the Music app. You don’t. mp4tomp3online.com converts MP4 to MP3 directly in your browser, free, with no app to install and no Apple ID hoops to jump through. It works in Safari and Chrome on any Mac, and takes less than a minute.
Audio options
Your files are converted inside your browser and are never uploaded to any server.
Why not just use the apps already on your Mac?
You can technically get audio out of a video with QuickTime Player by exporting, but the process is clunky: open the file, dig through menus, and you get limited control over quality. The Music app route is worse — you have to import the video into your library first and fiddle with import settings. Neither option handles multiple files at once, and neither lets you trim the audio or pick an exact bitrate. A browser converter skips all of that: open the page, drop in your file, and download the MP3.
Step 1: Open the converter in Safari or Chrome
Launch Safari or Chrome and head to mp4tomp3online.com. The page loads instantly — no installation, no extensions, no permissions to grant. Everything you need is right there on the page.
Step 2: Choose your MP4 file
Click the select button and pick the MP4 from your Mac, or drag the file straight from Finder onto the page. Videos in other formats work too — MOV (the format iPhones record in), AVI, MKV, and WEBM are all accepted, along with audio files like M4A and WAV.
Step 3: Set quality and convert
Open the options if you want control: 320 kbps for the best music quality, 192 kbps as a solid middle ground, or 128 kbps for voice recordings where small size matters most. You can also switch between stereo and mono or trim the audio to a specific section. Then press convert — the MP3 is ready in seconds and downloads straight to your Downloads folder, where you can play it in the Music app or anywhere else.
Works on any Mac, old or new
Because the converter runs on standard web technology, it doesn’t care which Mac you own. Apple silicon or Intel, the latest macOS or a version from several years ago — if your browser is reasonably up to date, the steps are identical. There’s no need to install command-line tools like ffmpeg, no Homebrew, no Terminal commands. If you can open a website, you can convert your files.
Your files stay private
Many online converters upload your file to their server for processing, which means your personal videos travel across the internet. This converter does the work inside your browser on your own Mac — nothing is uploaded, stored, or viewed by anyone. For private recordings, that peace of mind matters.
Tips for Mac users
If your videos come straight from an iPhone, they’ll usually be MOV files — the converter handles those natively, so no need to change anything first. For the best results with music, stick to 320 kbps; for lectures and voice memos, 128 kbps keeps files small with no audible downside. And if you’re converting several videos, queue them all up at once instead of doing them one at a time.
Frequently asked questions
Does it work in Safari?
Yes. The converter works in Safari as well as Chrome, Edge, and Firefox on Mac. Any up-to-date browser is fine.
Is it really free with no app to install?
Completely free, no limits, no account, and nothing to install — it all happens in your browser.
Do I need ffmpeg or any technical setup?
No. Everything is handled for you inside the page. There are no Terminal commands, no packages to install, and no settings to configure on your Mac.
Are my files uploaded anywhere?
No. Conversion runs entirely in your browser on your own Mac. Your files never leave your computer.