Step 1: Drop your AMR files using the button above or by deposit and leave.
Step 2: Click the 'Convert' button to start the conversion.
Step 3: Receive your converted AAC files.
AMR to AAC Conversion FAQ
What bitrate does the AAC file use?
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A lossy AAC is encoded at 192 kbps by default. The Audio Quality setting also offers 320 kbps for the best quality and 128 kbps for a smaller file. A lossless AAC (WAV, FLAC) ignores the bitrate and keeps every sample.
Is converting AMR to AAC a second round of lossy compression?
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Yes, and it is worth planning around. Both formats are lossy, so the AAC encoder is working from audio that has already been through one psychoacoustic pass, and its own decisions compound the first set. At 192 kbps or above the result is still transparent for most listening. If you have a lossless master anywhere, encoding the AAC from that instead avoids the double pass entirely. AMR is a narrowband speech codec running between 4.75 and 12.2 kbps, modelling the human vocal tract rather than the full audio spectrum. AAC is lossy but more efficient than MP3, and it handles up to 48 channels natively rather than being bolted onto a stereo design.
Can I tag the AAC with artist and album information?
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Yes, and it is a genuine gain over AMR, which has nowhere dependable to store any of it. AAC carries title, artist, album, year, track number and embedded cover art in the container itself, so a music library files it correctly without a manual pass. AAC sounds noticeably better than MP3 below 128 kbps and is the default audio track in MP4, YouTube, Apple Music and broadcast.
Why does music sound so poor in this conversion?
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Because one side of it is a speech codec rather than a music codec. It models the human vocal tract and discards everything outside telephone bandwidth, which is fine for a voice memo and destructive for anything with instruments in it. Converting away from it cannot restore the missing frequencies — they were never encoded in the first place. AMR destroys music: its 8 kHz bandwidth removes everything above telephone frequencies, and no amount of re-encoding brings it back.
Will going from AMR to AAC reduce my audio quality?
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If AMR is lossy and AAC is lossless (e.g. MP3 → WAV), the AAC file is no better than the AMR — you can't recover information that's already been thrown away. If AMR is lossless and AAC is lossy, expect the AAC codec to recompress; at 192 kbps this is transparent for most content.
Can I batch convert hundreds of AMR files to AAC?
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Several files in one job need a paid plan. Free use is one file per conversion, one conversion an hour. On a paid plan you can add several files to one job, then download each result on its own or all of them in one ZIP.
Will the AAC keep the same sample rate as AMR?
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By default yes (48 kHz AMR → 48 kHz AAC). If you need to downsample for compatibility (e.g. 96 kHz → 44.1 kHz for CD burning) the advanced sample-rate option does this with high-quality resampling.
Can I normalize loudness in the AMR to AAC step?
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Not in this step. The converter has no loudness setting and leaves the level as it is. To even out the volume, run the finished AAC through a Normalize tool on this site.
Will the AAC play on my car stereo / iPod / audiobook app?
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MP3 plays almost everywhere. AAC plays on Apple devices, most Android phones and Sonos. FLAC plays on Sonos and Android but not on older iPods, and WAV plays on nearly everything but makes large files. There are no device presets on this page, so choose the target format your player supports.
Is my AMR file private during conversion?
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Yes. Nobody listens to or shares the audio, which matters for personal audiobook libraries, and uploaded AMR files and their converted copies are deleted automatically about 24 hours after conversion.
