Does converting AAC to AIFF improve quality?

No. AIFF faithfully represents the decoded AAC audio without adding artifacts, but it cannot restore data that was lost during AAC encoding. The quality is preserved, not enhanced.

Why not just import AAC directly into Logic Pro?

While Logic Pro can import AAC, working with uncompressed AIFF avoids real-time decoding overhead. On complex projects with many tracks, AIFF files reduce CPU load and potential glitches.

How much larger will the AIFF be?

AIFF is uncompressed, so files are roughly 8-10 times larger than AAC. A 6 MB AAC file becomes approximately 50 MB as AIFF.

Will the AIFF retain the sample rate of the AAC?

Yes. The output AIFF matches the original AAC's sample rate, typically 44.1 kHz for music content or 48 kHz for video-sourced audio.

Is AIFF better than WAV for Mac editing?

Both are uncompressed and sound identical. AIFF has slightly better integration with Apple's tools and is the traditional Mac audio standard, while WAV is more universal across platforms.

AAC to AIFF Converter

AAC files need to be decoded before professional editing, and AIFF is the ideal uncompressed target for Apple-based workflows. Converting AAC to AIFF gives you clean, uncompressed audio that Logic Pro and other Mac DAWs handle with zero decompression latency during playback and editing.

100% Private — Your files never leave your device

Convert AIFF to AAC instead

Converting AAC to AIFF decodes the compressed audio to uncompressed PCM in Apple's native format. The resulting AIFF is a faithful representation of the decoded AAC, free from any additional processing artifacts.

How to Convert AAC to AIFF

1
Upload your AAC audio file to the converter.
2
Select AIFF as your desired output format.
3
Click Convert and download the uncompressed AIFF file.

AAC vs AIFF — Format Comparison

Feature	AAC	AIFF
Full Name	Advanced Audio Coding	Audio Interchange File Format
Type	Audio	Audio
Codec	AAC-LC / HE-AAC / AAC-ELD	PCM (uncompressed)
Lossless	No	Yes
Extension	.aac	.aiff
Best For	Apple Music and iTunes	Professional music production on Mac (Logic Pro, GarageBand)

AAC Strengths

Better quality than MP3 at same bitrate
Native support on Apple devices and iTunes
Default audio codec in MP4 video containers

AIFF Strengths

Lossless, uncompressed audio quality
Native support on macOS and all Apple devices
Industry standard for Mac-based music production

Frequently Asked Questions

When to Convert AAC to AIFF

Decoding AAC audio for editing in Logic Pro X or GarageBand
Creating uncompressed working copies from AAC podcast recordings
Preparing AAC audio samples for use in professional Mac-based production
Importing iTunes AAC purchases into professional editing workflows

Related Conversions

AACMP3 AACWAV AACFLAC AACOGG MP3AIFF WAVAIFF FLACAIFF OGGAIFF

Embed This Converter on Your Website

Add a free AAC to AIFF converter to your site with one line of code. No API key needed.

Get Embed Code

About Our AAC to AIFF Converter

This converter uses FFmpeg compiled to WebAssembly (WASM) to transform your AAC files into AIFF format entirely inside your web browser. When you select a file for conversion, the processing happens locally on your device. Your file is never uploaded to any server, never transmitted over the internet, and never stored anywhere outside your own computer. This privacy-first architecture makes our tool safe for confidential and sensitive content — including legal recordings, medical files, financial presentations, personal media, and any other material you would not want on a third-party server.

The conversion process works by decoding the AAC input using FFmpeg's highly optimized decoders, then encoding the output in AIFF format with carefully tuned settings that balance quality and file size. When possible, the tool uses stream copy mode to remux (rewrap) compatible streams without re-encoding, which preserves the original quality with zero generational loss. When re-encoding is necessary due to codec differences between the two formats, the converter uses high-quality encoding settings to minimize any visible or audible quality reduction.

Supported input formats include MP3, WAV, AAC, FLAC, and OGG for audio, with automatic detection of the codecs and parameters inside your source file. The output is optimized for maximum compatibility with modern devices and platforms including Windows, macOS, Linux, iOS, Android, smart TVs, and all major web browsers.

Why browser-based conversion is safer: traditional online converters require you to upload your file to a remote server, where it is processed by third-party infrastructure and then made available for download. This workflow exposes your data to interception during upload, unauthorized access on the server, unclear data retention policies, and potential data breaches. Professionals in regulated industries such as healthcare (HIPAA), legal (attorney-client privilege), and finance (SOX, GDPR) often cannot use server-based converters without violating compliance requirements. Our WebAssembly-powered approach eliminates all of these risks by ensuring your data never leaves the browser sandbox on your own device.

The tool handles files up to 500 MB on desktop browsers and 200 MB on mobile devices. No account registration, no software installation, and no recurring subscription is required. Conversion typically completes in seconds for small files and a few minutes for larger ones, depending on your device's processing capabilities. Once the conversion is finished, you can download the result immediately and the source data is discarded from browser memory.