Step 1: Upload your M4R 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 AMR files.
M4R to AMR Conversion FAQ
Is M4R to AMR a lossy or lossless conversion?
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If both M4R and AMR are lossless (WAV, FLAC, AIFF), no quality is lost. If AMR is lossy (MP3, AAC, OGG, Opus), audio is re-encoded; we default to a high bitrate (192-320 kbps) for near-transparent quality.
Can I convert a stereo M4R to mono AMR?
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Yes — toggle the 'force mono' option. This is useful for podcasts and voice memos to roughly halve file size.
Can I batch-convert M4R files to AMR?
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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.
Is the M4R to AMR converter free?
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Yes. One conversion an hour is free, with no account needed, for a file within the free size limit. A paid plan removes the hourly limit and the size limit, and lets you add several files to one job.
Does the converter remove DRM from M4R files?
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No. PDF.to does not attempt to remove DRM. Conversions only succeed on unprotected source files.
Are my M4R files private during conversion?
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Yes. Uploads travel over HTTPS, nobody reads the contents, and nothing is shared. Your uploaded M4R and the resulting AMR are deleted from our servers automatically about 24 hours after the conversion, which leaves time to download the result.
