Convert MP4 to AIFF Online Free
Extract the audio from your MP4 video and save it as AIFF — Apple's professional uncompressed audio format. Ideal for audio production, Logic Pro sessions, and mastering workflows.
ChangeThisFile extracts audio from your MP4 video and converts it to AIFF using FFmpeg on our secure servers. AIFF is Apple's uncompressed audio format used in professional production and Logic Pro. Files are auto-deleted after conversion, completely free with no signup needed.
Convert MP4 to AIFF
Drop your MP4 file here to convert it instantly
Drag & drop your .mp4 file here, or click to browse
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MP4 vs AIFF: Format Comparison
Key differences between the two formats
| Feature | MP4 | AIFF |
|---|---|---|
| Type | Video container (audio + video) | Uncompressed audio container (Apple) |
| Developer | MPEG / ISO standard | Apple Computer |
| Compression | Lossy video + lossy/lossless audio | Uncompressed PCM audio (no compression) |
| File size | Large (includes video) | Very large — uncompressed audio data |
| Audio quality | Dependent on source codec | Bit-perfect, studio-grade quality |
| Compatibility | Universal video players | macOS, iOS, Logic Pro, Audacity, DAWs |
| Metadata | Title, chapters, subtitles | ID3 and AIFF chunks: artist, album, cover |
| Use case | Video delivery and streaming | Professional audio production, mastering, Logic Pro |
When to Convert
Common scenarios where this conversion is useful
Import audio into Logic Pro or GarageBand
AIFF is the native uncompressed format for Apple's Logic Pro and GarageBand. Convert MP4 video audio to AIFF to import it into your project timeline with no codec conversion overhead during playback.
Prepare source audio for professional mastering
Mastering engineers work with uncompressed audio to avoid any additional quality loss. Extract audio from MP4 recordings as AIFF to provide a clean, uncompressed source file for mastering or mixing sessions.
Extract audio from video for sound design work
Film and game sound designers often need to extract reference audio or dialogue from MP4 video sources. AIFF provides uncompressed audio that can be manipulated in Pro Tools, Reaper, or other professional DAWs without quality constraints.
Create sample packs from video recordings
Convert interesting sounds recorded in video format (field recordings, instruments, ambient sounds) to AIFF for use as samples in music production. AIFF integrates natively with Logic Pro's EXS24 and Native Instruments Kontakt.
Archive broadcast or film audio in uncompressed format
Broadcasters and archivists use AIFF for long-term audio preservation from original masters. Convert MP4 source recordings to AIFF to ensure the archived audio has no lossy encoding artifacts.
How to Convert MP4 to AIFF
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1
Upload your MP4 file
Drag and drop your .mp4 file onto the converter or click to browse and select it. Files up to 500MB are supported.
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2
Server-side AIFF conversion
Your file is uploaded over HTTPS and FFmpeg extracts and decodes the audio stream, writing it as uncompressed PCM audio inside an AIFF container. The video stream is discarded entirely.
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3
Download your AIFF file
Click Download to save your .aiff or .aif file. The MP4 and AIFF are automatically deleted from our servers after download. Note that AIFF files are large — ensure you have adequate local storage.
Frequently Asked Questions
AIFF (Audio Interchange File Format) is an uncompressed audio format developed by Apple. Unlike MP3, which discards audio data to reduce file size, AIFF stores audio in full PCM fidelity with no loss. This makes AIFF much larger but ideal for professional production.
AIFF is uncompressed, so the output size is determined by duration, sample rate, and bit depth rather than compression. A 5-minute audio track at 44.1 kHz / 16-bit stereo produces roughly 50MB as AIFF, regardless of how small the original MP4 audio was.
The AIFF will be a lossless representation of the audio as it exists in the MP4. If the original audio was AAC or MP3 (lossy), those encoding artifacts will be preserved — AIFF conversion does not recover lost quality from prior lossy encoding.
Yes. AIFF is one of Logic Pro's primary native audio formats. You can drag AIFF files directly into a Logic Pro project timeline and they will be recognized and played back without any format conversion.
AIFF and WAV are both uncompressed PCM audio formats with very similar quality and file sizes. AIFF was developed by Apple and is preferred on macOS, while WAV was developed by Microsoft and is more common on Windows. Both are widely supported.
AIFF support on Windows requires a third-party codec. VLC, foobar2000, and iTunes for Windows all support AIFF natively. Windows Media Player does not support AIFF without additional codecs.
FFmpeg decodes the MP4 audio and writes AIFF at the native sample rate and bit depth of the source. Most MP4 video audio is 44.1 kHz or 48 kHz at 16-bit, which is what the AIFF will contain.
Yes. ChangeThisFile is completely free for any use. There are no restrictions on commercial or professional use of the converter.
Conversion is typically fast — FFmpeg extracts and decodes audio without complex processing. Expect a few seconds for short clips and up to a minute for longer videos.
Yes. All uploads use HTTPS encryption and files are automatically deleted from servers immediately after conversion. We never retain, access, or share your files.
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