AIFF to MP3 Converter

How to Convert AIF to MP3 Online

1. Upload Your AIF File: Drag and drop or click "Add Files" to select .aif or .aiff files. GarageBand exports, Logic Pro bounces, ProTools session renders, and Mac CD-rips all work — the .aif extension is just the 3-letter Windows-safe variant of AIFF. Batch is supported, so entire albums convert in one pass.
2. Pick MP3 Bitrate Mode: Choose constant bitrate (CBR) for predictable file size or variable bitrate (VBR) for better quality at the same average size. Common bitrates: 128 kbps (~1 MB/min, podcasts), 192 kbps (good music quality), 256 kbps (high quality), 320 kbps (best MP3 quality).
3. Set Sample Rate, Channels, and Trim: Match the source rate (typically 44.1 kHz) or downsample to 22.05 kHz for speech. Choose mono or stereo. Optionally trim using start time + duration in HH:MM:SS.sss format to extract a single song from a long session render.
4. Convert and Download: Click Convert. Files convert in your browser session and download individually or as a ZIP — no sign-up, no watermark.

Why Convert AIF to MP3?

AIF is the 3-letter version of Apple's AIFF (Audio Interchange File Format) — uncompressed PCM audio dating back to 1988, the macOS counterpart to WAV. The two extensions point at the same byte format; Windows historically preferred a 3-letter extension, so older Mac apps and burning utilities saved with .aif. The file is lossless and editor-friendly but enormous: roughly 10 MB per minute of CD-quality stereo. MP3 is lossy compressed audio that's 8-15× smaller at quality indistinguishable from the source for most listeners. Common reasons to convert AIF → MP3:

• Drastically smaller file sizes — A 4-minute AIF song is ~40 MB. The same song as 320 kbps MP3 is ~9 MB; as 192 kbps MP3, ~5 MB. That's a 75-90% reduction with negligible audible difference at 256-320 kbps.
• Universal device playback — Every device made since the late 1990s plays MP3: cars, phones, MP3 players, smart speakers, gaming consoles, kiosks, fitness equipment, Bluetooth headphones. AIF is mostly limited to Mac and pro audio software; many Android players and Windows defaults skip it.
• Sharing GarageBand and Logic Pro exports — These DAWs default to AIFF/AIF on bounce. Recipients on Windows or Android often can't play the file. MP3 plays everywhere without configuration.
• Streaming and uploading to platforms — SoundCloud, Bandcamp (free tier), YouTube, podcast hosts, and email all prefer MP3 over AIF. Many platforms reject AIF outright at upload.
• Mobile storage and battery — Phones can hold roughly 10× more songs as MP3 vs AIF. Streaming MP3 uses less network and battery than uncompressed PCM.
• Email, Discord, and messaging app limits — Discord caps free uploads at 8 MB, Gmail at 25 MB. AIF blows past these immediately; MP3 fits comfortably.

See also AIFF to MP3 for the 4-letter variant, or AIFC to MP3 for the compressed AIFF flavor.

AIF vs MP3 — Format Comparison

MP3 Bitrate Choice

Frequently Asked Questions

Is .aif the same format as .aiff?

Yes — the bytes inside are identical. Apple originally specified the format as AIFF, but early cross-platform tools needed a 3-letter extension for Windows (FAT/8.3 era), so .aif became common. macOS, iTunes, GarageBand, and Logic Pro all read both interchangeably. The MP3 conversion is identical regardless of which extension your source uses.

Will converting AIF to MP3 reduce audio quality?

Yes — MP3 is lossy. The encoder discards audio data that perceptual studies suggest is below the threshold of hearing. At 256-320 kbps the difference from the source AIF is inaudible to most listeners in normal conditions. At 128 kbps you may notice subtle high-frequency softness on cymbals and reverb tails. Keep your AIF masters as backup; deliver MP3 to listeners.

What bitrate should I pick?

For music distribution: 320 kbps CBR or V0 VBR for highest MP3 quality, or 192-256 kbps for a smaller-but-still-excellent balance. For podcasts and speech: 128 kbps CBR is plenty. For audiobooks: 96-128 kbps mono cuts size further. Match the source sample rate (usually 44.1 kHz) to avoid resampling.

Why is the MP3 so much smaller than the AIF?

AIF stores every PCM sample at full bit depth — 16 or 24 bits times 44,100 samples per second times 2 channels = ~1411 kbps. MP3 uses psychoacoustic modeling to keep only what your ears can detect, often at one-tenth the data rate. The compression ratio is 8-15× depending on bitrate. The reduction is real and lossy, but at 320 kbps it's effectively transparent.

Can I batch convert an entire AIF album to MP3?

Yes — drop in all the tracks at once. They convert in parallel within your browser session and download individually or as a single ZIP. Settings can apply uniformly (typical for albums) or be tuned per file.

Will track titles, artist names, and album art transfer?

ID3 metadata transfer depends on what's embedded in the source AIF. Modern GarageBand, Logic, and iTunes exports include full metadata blocks that map to MP3 ID3v2 tags (artist, title, album, year, track number, embedded artwork). Older .aif files burned from CDs or saved by legacy tools may have no embedded tags, in which case the output MP3 will also be untagged — add tags afterward in iTunes/Music or a tag editor.

Should I use CBR or VBR?

VBR (variable bitrate) uses fewer bits during simple passages and more during complex passages, giving better quality per byte than CBR at the same average bitrate. Use VBR for music. CBR (constant bitrate) has predictable file size and is required by some streaming and broadcast workflows. Use CBR for podcasts and broadcast.

Can I trim part of an AIF and save as MP3?

Yes. Use the trim section to enter a start time and duration. Both accept seconds (12.5) or HH:MM:SS.sss format (00:01:30.500). Useful for pulling a single song from a long DJ-mix .aif or extracting a clip from a recording session render.