AMR to AIFF Converter
Convert AMR files to AIFF format online for free. No installation or registration required.
Quick Answer: How to Convert AMR to AIFF
AMR is the Adaptive Multi-Rate codec built for mobile phone voice recording, while AIFF is Apple's uncompressed audio format, the Mac-side counterpart to WAV. Converting AMR to AIFF wraps or re-encodes your audio into the AIFF structure, but be aware: quality lost when the AMR was created stays lost — a AIFF made from a lossy source is a perfect copy of an imperfect original. Run it free at practicalwebtools.com/convert/audio/amr-to-aiff: drop in your AMR, adjust settings if you like, and download the AIFF — no signup, no upload, everything stays on your device.
AMR vs AIFF: Which One and Why
AMR is the Adaptive Multi-Rate codec built for mobile phone voice recording, standardized by 3GPP in 1999 for GSM and 3G voice calls. AIFF is Apple's uncompressed audio format, the Mac-side counterpart to WAV, designed by Apple in 1988 from Electronic Arts' IFF standard. People reach for AMR mainly for phone voice memos, call recordings, answering machines, while AIFF is the usual choice for professional music production on macOS, DJ software libraries, sample packs. AMR's headline strength: tiny files — a minute of voice is under 1 MB. AIFF's: bit-perfect quality. On the other side of the ledger, AMR limitation: unusable for music — the codec discards everything above ~3.4 kHz (phone-line bandwidth) — and AIFF limitation: same huge file sizes as WAV.
How to Convert AMR to AIFF Online
- 1
Add your AMR file: Drag and drop it into the converter, or click to browse. AMR files up to the size limit are accepted, and nothing is uploaded — processing runs locally in your browser.
- 2
Set AIFF options: The converter re-encodes into AIFF, which is uncompressed PCM — same size as WAV at equal settings. Set quality to maximum since you're going lossless — no reason to trim bits you already have.
- 3
Download the AIFF: Conversion runs on your device. When it completes, download the AIFF file — repeat for as many files as you need, free and unlimited.
Key Facts
- AMR: standardized by 3GPP in 1999 for GSM and 3G voice calls, lossy, speech-only — from 4.75 to 12.2 kbps.
- AIFF: designed by Apple in 1988 from Electronic Arts' IFF standard, uncompressed PCM — same size as WAV at equal settings.
- Converting AMR → AIFF cannot restore what the AMR encoding already discarded — the AIFF is a faithful copy of the AMR, not of the original recording.
- AMR strength: tiny files — a minute of voice is under 1 MB.
- AIFF strength: bit-perfect quality.
- AMR limitation to know: unusable for music — the codec discards everything above ~3.4 kHz (phone-line bandwidth).
- AIFF limitation to know: same huge file sizes as WAV.
- Under the hood: AIFF-C (compressed AIFF, the .aifc extension) can hold IMA/SDX2 codecs — rare today, but why some .aifc files are far smaller than expected
Format Background
AMR
AMR — standardized by 3GPP in 1999 for GSM and 3G voice calls. AMR locks to one of 8 bitrates and can switch mid-file — old phones used this to maintain calls as signal degraded
AIFF
AIFF — designed by Apple in 1988 from Electronic Arts' IFF standard. AIFF-C (compressed AIFF, the .aifc extension) can hold IMA/SDX2 codecs — rare today, but why some .aifc files are far smaller than expected
Frequently Asked Questions
Will converting AMR to AIFF lose quality?
The AIFF output preserves everything present in your AMR file — but AMR is lossy, speech-only — from 4.75 to 12.2 kbps, so information discarded when that file was made is gone for good. You get a bit-perfect copy of what you have, not a restoration of the original recording.
Are my files uploaded anywhere during AMR → AIFF conversion?
No. This converter runs on WebAssembly inside your browser — your AMR file is read from disk, processed by your device's CPU, and the AIFF is written back locally. There is no server upload at any point, which also means no size-based throttling or waiting in queue.
Does converting AMR to AIFF restore lost quality?
No — and this trips up a lot of people. AMR is lossy, speech-only — from 4.75 to 12.2 kbps: the data it discarded at creation time cannot be reconstructed by any converter. A AIFF from a AMR source sounds exactly as good as the AMR, no better. The reasons to convert anyway are compatibility, editing headroom, and future-proofing — not restoration.
What AIFF settings should I choose?
For professional music production on macOS, start with the converter's default preset — it's tuned for the common case. Since the target is lossless, use maximum quality; the file grows but nothing is discarded.
Why is my AIFF file larger/smaller than the AMR original?
AIFF is uncompressed PCM — same size as WAV at equal settings, while AMR is lossy, speech-only — from 4.75 to 12.2 kbps. File size follows from that: moving to a less aggressive or lossless target grows the file; moving to efficient lossy compression shrinks it. AIFF-C (compressed AIFF, the .aifc extension) can hold IMA/SDX2 codecs — rare today, but why some .aifc files are far smaller than expected
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Further reading
Guides and explainers on the Practical Web Tools blog cover audio and video formats in depth — or browse every audio converters pair from the hub.