Step 1: Upload your AIFF files using the button above or by drag and drop.
Step 2: Click the 'Convert' button to start the conversion.
Step 3: Download your converted AC3 files.
AIFF to AC3 Conversion FAQ
How do I convert AIFF to AC3 audio?
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Upload your AIFF file and PDF.to re-encodes it into a AC3 container with sensible default bitrate and sample-rate. The AC3 download is ready in seconds.
Is AIFF to AC3 a lossy or lossless conversion?
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If both AIFF and AC3 are lossless (WAV, FLAC, AIFF), no quality is lost. If AC3 is lossy (MP3, AAC, OGG, Opus), audio is re-encoded; we default to a high bitrate (192-320 kbps) for near-transparent quality.
What bitrate does the AC3 output use?
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192 kbps by default for AC3 where applicable. Use the options panel to pick 96, 128, 192, 256, or 320 kbps depending on whether you want smaller files or higher fidelity.
Are tags (artist, title, album) preserved when converting AIFF to AC3?
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Yes. ID3 / Vorbis / iTunes-style tags are mapped across formats. Album artwork is preserved when AC3 supports it.
Will sample-rate and bit-depth survive the AIFF to AC3 conversion?
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Yes by default. We do not downsample or dither unless you ask for it in the options panel. For voice you can opt into 22 kHz mono to shrink file size.
Can I convert a stereo AIFF to mono AC3?
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Yes — toggle the 'force mono' option. This is useful for podcasts and voice memos to roughly halve file size.
Does PDF.to support multi-channel (5.1, 7.1) AIFF files?
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Yes for AC3 formats that support multi-channel (AC3, FLAC, Opus). For stereo-only targets, multi-channel audio is downmixed using a perceptually weighted mix.
Can I batch-convert AIFF files to AC3?
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Yes. Drop a whole folder of AIFF files; each becomes a separate AC3 and all are zipped for download.
Is the AIFF to AC3 converter free?
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Yes for files under 100 MB. PRO unlocks larger files (5 GB), parallel jobs, and higher bitrates.
Does the converter remove DRM from AIFF files?
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No. PDF.to does not attempt to remove DRM. Conversions only succeed on unprotected source files.
Will the AC3 I download play on iPhone, Android, and desktop?
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Yes. AC3 is supported natively across all major platforms or via universally available codecs. We default to the most-compatible AC3 profile.
Are my AIFF files private during conversion?
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Yes. Uploads are encrypted in transit, the conversion runs in an isolated worker, and both the AIFF and AC3 files are deleted within an hour.