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 MP4 files.
AIFF to MP4 Conversion FAQ
How do I convert AIFF to MP4?
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Drop your AIFF file onto the upload box (or click to browse), wait a few seconds while PDF.to converts it, and download the resulting MP4 file. No account, plugin, or install required.
Is the AIFF to MP4 converter free?
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Yes. Basic AIFF to MP4 conversions are free for everyone on PDF.to. Paid plans unlock larger files, batch jobs, and priority processing.
Will I lose quality going from AIFF to MP4?
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Quality depends on the format pair. We use the best available encoder for MP4 and pass through metadata when the target format supports it. For lossy targets, our defaults aim for the smallest noticeable difference.
What is the maximum AIFF file size I can convert?
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Free users can convert AIFF files up to 100 MB. PRO subscribers can convert files up to 5 GB and run batches in parallel.
Can I batch-convert multiple AIFF files to MP4?
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Yes — drag any number of AIFF files onto the page at once. Free accounts process them sequentially; PRO accounts process them in parallel for faster results.
Does PDF.to keep my AIFF files?
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No. Your AIFF uploads and the resulting MP4 files are deleted from our servers within an hour of the job finishing. We do not read, index, or share their contents.
Does the AIFF to MP4 converter work on mobile?
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Yes. The whole interface is mobile-responsive and conversions run server-side, so your phone or tablet does not need processing power — just a browser.
Do I need to install anything to convert AIFF to MP4?
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No. Everything happens in your browser. There is nothing to download, install, or update, and no extension to grant permissions to.
How long does a AIFF to MP4 conversion take?
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Most AIFF files convert to MP4 within a few seconds. Large or complex files (high-resolution video, multi-page documents, many pages) may take up to a minute.
Can I convert AIFF to MP4 without an account?
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Yes. You can convert AIFF files to MP4 anonymously. Creating a free account just adds conversion history and a larger daily quota.
Which browsers does the AIFF to MP4 converter support?
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All modern browsers — Chrome, Firefox, Safari, Edge, and Brave. Internet Explorer is not supported. Mobile Safari and Chrome on Android both work.
What if my MP4 download does not start automatically?
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Click the Download MP4 button on the results page. If your browser is blocking the download, check the popup-blocker icon in the address bar, or right-click and choose Save link as.