Convert AIFF to MP3
Convert AIFF to MP3 on your device. Choose your file, convert, and check the result before sharing.
Drop the aiff file
Drag your AIFF onto the page or click to browse. It is read locally, never sent anywhere.
Choose MP3 and bitrate
Pick 128, 192, 256 or 320 kbps. 192 kbps is the default. Click Convert to start processing in this tab.
Save the mp3
The finished MP3 downloads straight back to your device. Nothing touched a server on the way.
Why convert here, not there
No upload, ever
Audio files are personal. AIFF to MP3 here happens inside one browser tab, end to end.
Local conversion
Conversion runs locally after you click Convert. The first audio or video conversion may need to download the converter engine.
No account, no daily cap
No account or daily conversion quota. The per-file cap is 2 GB, and available device memory can impose a lower practical limit.
The two formats, briefly
| AIFF | AIFF is an audio container. This converter writes 16-bit PCM audio; a higher-bit-depth source can lose precision. | |
|---|---|---|
| MP3 | MP3 is a lossy audio format. This converter encodes it at the selected bitrate rather than copying the original audio stream. | |
When you need this
- Use MP3 when your receiving app or player does not accept AIFF. This page re-encodes the audio, so keep the original and check the download in that app before replacing it.
Tested on a sample file
On 26 October 2026 we converted a synthetic 90-second stereo AIFF file (15.1 MB, 44.1 kHz; tones and noise, not music) to MP3 at the default 192 kbps in Chrome on a Linux server, not a laptop or phone. The result was a 2.1 MB MP3 of the same length, about 14% of the AIFF size. It took about 1.5 seconds once the converter had loaded.
AIFF is uncompressed, so it is large. The MP3 size follows the bitrate you pick: for this file the 128 kbps option gave 1.4 MB.
We decoded each MP3 from start to end with no errors. We did not listen to them. Not tested: phones, Safari, real music recordings, long files.
AIFF vs MP3: what changes
| AIFF | MP3 | |
|---|---|---|
| Kind | Audio | Audio |
| Compression | 16-bit PCM output here | Lossy audio |
| Typical size | Depends on the file and encoding settings. | Measure the exported file; it may be larger. |
| Opens on | Check the source in your app and browser. | Check the downloaded file in the receiving app. |
| Best for | Keep the original as your source. | MP3 workflows, subject to the limits below. |
Keep the original. Compare the exported file before sharing or replacing it.
Good to know
- The audio bitrate choices are 128, 192, 256 and 320 kbps, with 192 kbps as the default. Lower bitrates usually reduce size but can make loss more audible.
- First use downloads the audio/video engine (about 30 MB). The input cap is 2 GB, but available browser memory can run out below that.