AIFF to AIFF Converter

How to Convert AIF to AIFF Online

1. Upload Your AIF Files: Drag and drop or click "Add Files" to select your .aif files. The page also accepts .aiff directly, since both extensions point at the same Audio Interchange File Format. Batch is supported, so you can drop in an entire session folder at once.
2. Pick the AIFF PCM Encoding: Default is PCM 16-bit Big Endian — the original AIFF byte order, which means the output is bit-identical to the input when the source is already 16-bit PCM. Choose PCM 24-bit Little Endian to widen dynamic range for studio masters, PCM 32-bit Little Endian for DAW intermediates, or A-law / mu-law for telephony archives. FLAC and MP3 are also available inside the AIFF container if you specifically want a compressed payload.
3. Set Sample Rate, Channels, and Trim (Optional): Leave the sample rate at "Original" to keep the source rate (typically 44.1 kHz for music, 48 kHz for video audio), or pick from the dropdown (8 kHz to 48 kHz). Choose mono or stereo. Optionally trim using start time + duration in seconds (12.5) or HH:MM:SS.sss format (00:01:30.500).
4. Convert and Download: Click Convert. Files process in your browser session and download individually or as a ZIP — no sign-up, no watermark.

Why Convert AIF to AIFF?

.aif and .aiff are two extensions for the same Audio Interchange File Format that Apple published in 1988. The 3-character .aif form survived from the classic Mac OS era and from Windows tools that needed an 8.3-style extension; .aiff is the longer modern spelling and the one Apple's own documentation uses. The bytes inside are byte-for-byte identical when the codec, bit depth, sample rate, and channel layout are unchanged — so a default AIF-to-AIFF conversion is effectively a rename plus a header rewrite, not a re-encode. Common reasons to do it anyway:

• Strict tools that key on the extension — Some upload forms, library importers, and older media players whitelist .aiff and reject .aif as "unknown," even though the file contents are valid. Renaming through a converter (rather than by hand) gives you a clean header alongside the new extension.
• macOS metadata cleanup — When .aif files are dragged between Windows shares and macOS volumes, the Finder sometimes leaves stale resource-fork or ._ companion files. Re-saving as .aiff produces a single clean file with a fresh AIFF header.
• Standardizing a mixed library — If your sample folder is half .aif (older Logic Pro and CD-rip exports) and half .aiff (newer GarageBand and Pro Tools bounces), unifying everything to .aiff makes batch operations and search filters predictable.
• Optionally widening bit depth — While converting, you can output PCM 24-bit or 32-bit AIFF if you plan further processing (EQ, gain staging, time-stretching) and want the extra headroom that the source 16-bit AIF didn't carry.
• Producing a compressed AIFF payload — AIFF-C lets the same container hold FLAC, MP3, or A-law/mu-law data. If a downstream tool insists on the .aiff extension but you also need a smaller file, this conversion lets you pick a compressed codec inside the AIFF wrapper.

Need the inverse rename or a different target? See AIFF to AIF, AIF to WAV, or AIF to MP3.

AIF vs AIFF — What Actually Differs

The only meaningful difference between the two is the extension string. The internal AIFF FORM/COMM/SSND chunk structure, the magic bytes, and the PCM byte order are identical.

AIFF PCM Encoding Quick Guide

Frequently Asked Questions

Are .aif and .aiff actually different formats?

No — they are the same Audio Interchange File Format that Apple published in 1988. The only difference is the extension string. Most modern tools (macOS Finder, iTunes/Music, QuickTime, GarageBand, Logic Pro, Pro Tools, Audacity, FFmpeg) read both interchangeably. The convention that .aif is "Windows" and .aiff is "Mac" is a historical artifact of the 8.3 filename era; today it is just a naming preference.

If they are the same format, will my audio actually change during conversion?

By default, no. When you keep the codec at PCM 16-bit Big Endian and leave the sample rate, channel count, and bit depth at their original values, the audio data is bit-identical — only the file extension and a small header refresh apply. The output is a clean, well-formed AIFF that you can hash against the source's audio payload and get the same result. Audio only changes when you deliberately pick a different codec (FLAC, MP3, mu-law) or change the sample rate / bit depth / channel count.

Why would anyone convert AIF to AIFF if the contents are the same?

Three common reasons. First, some software whitelists the .aiff extension and rejects .aif, so a controlled rename via a converter avoids hand-editing filenames and produces a clean header. Second, batch unification — if your library mixes both extensions, the converter standardizes the whole set in one pass. Third, you want to take the conversion as an opportunity to bump bit depth, change sample rate, or wrap the audio in FLAC inside an AIFF-C container.

Can I just rename the file from .aif to .aiff instead?

In most cases yes — for default uncompressed PCM, a manual rename produces a working .aiff file because the format inside is unchanged. However, the converter is useful when (a) you need a fresh header with no stale chunks, (b) you are batch-processing dozens or hundreds of files, (c) the source has unusual chunks that you want stripped, or (d) you simultaneously want to change codec, sample rate, bit depth, or channel count.

Will the file size be the same after conversion?

If you keep all settings at their defaults, yes — within a few hundred bytes for the header. PCM audio at the same bit depth, sample rate, and channel count produces the same payload size in both .aif and .aiff. A 5-minute 16-bit / 44.1 kHz stereo file is roughly 50 MB either way. Size only changes if you switch to a compressed codec (FLAC for lossless ~50%, MP3 for lossy ~10x reduction) or alter sample rate / bit depth.

Will loop points, markers, and metadata transfer?

The PCM audio data transfers bit-perfectly. AIFF stores loop points and instrument data in MARK and INST chunks, and these survive an AIF-to-AIFF conversion since the container family is the same. Track titles and artist tags stored in NAME, AUTH, and ANNO chunks also carry over. Tooling support for these chunks varies by application, so always test in your target software (sampler, DAW, media player) after conversion.

Should I bump up to 24-bit AIFF while I'm at it?

Only if the audio will go through further processing. Up-converting a 16-bit source to 24-bit AIFF does not add information that wasn't in the source — it just zero-pads the lower bits. The benefit appears later, when EQ, gain staging, time-stretching, or summing accumulates rounding error: 24-bit gives you headroom to absorb that math. If the file is a final deliverable you won't edit again, keep it 16-bit and save space.

Can I batch convert a folder of AIF files to AIFF?

Yes — drop the whole folder at once and the files convert in parallel within your browser session. Settings can apply uniformly across the whole batch (typical when you just want to standardize the extension) or be tuned per file. Downloads come individually or as a single ZIP.

Does this work on mobile, and does it leave my files anywhere?

The converter runs in any modern browser (mobile or desktop) and processes inside your browser session. There's no sign-up and no watermark. Files are not retained server-side after the session ends.