Convert MP3 to AIFF
Free online MP3 to AIFF converter that runs in your browser. Your files stay on your device.
How to convert MP3 to AIFF
- Add your MP3 file. Drag it onto the box above, click to browse, or paste it from the clipboard. Multiple files are fine.
- Check the target. AIFF is preselected. Pick High, Medium or Small quality depending on whether you need a master copy or a small file.
- Download. The conversion engine loads once (32 MB) and then your file is processed locally. The AIFF file downloads automatically when it is done.
Why convert MP3 to AIFF?
MP3 files are not supported everywhere. Converting to AIFF gives you an uncompressed file that editors, DAWs and mastering tools handle natively.
MP3 vs AIFF
| MP3 | AIFF | |
|---|---|---|
| Full name | MPEG Audio Layer III | Audio Interchange File Format |
| Type | Audio | Audio |
| MIME type | audio/mpeg | audio/aiff |
| About | MP3 is the universal audio format. Every device and app plays it; 192–320 kbps sounds transparent for most listeners. | AIFF is Apple's uncompressed audio format, equivalent to WAV. Used in Logic Pro and professional mastering. |
What makes this converter different
- Nothing is uploaded. Other converters send your file to a server, queue it, and keep a copy for hours. Here the work happens in your browser with WebAssembly, so private videos, voice memos and documents never leave your computer.
- No limits, no sign-up, no watermark. There is no server to pay for, so there is no reason to cap file size or count.
- Real ffmpeg quality. Video and audio use the same ffmpeg encoders professionals use (x264, LAME, libvpx, FLAC), not a stripped-down web codec.
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Frequently asked questions
Is it safe to convert MP3 to AIFF here?
Yes. The conversion runs entirely inside your browser using WebAssembly. Your file is never uploaded to a server, so nothing can leak, be stored or be seen by anyone. You can even disconnect from the internet after the page loads.
How long does MP3 to AIFF conversion take?
Audio converts at roughly 20–50× real time, so a 5-minute song takes about 10 seconds after the one-time engine download.
Is there a file size limit?
There is no server-side limit because there is no server. The practical limit is your device memory: browsers can handle files up to about 2 GB. Very large videos work better on a desktop than a phone.
Will the quality drop?
AIFF is lossless, so no quality is lost relative to the source. It cannot recover detail that a lossy source already discarded.
Can I convert several MP3 files at once?
Yes. Drop or select as many files as you like; they are converted one after another and each gets its own download button.