Upload your WAV file and PDF.to re-encodes it into a M4R container with sensible default bitrate and sample-rate. The M4R download is ready in seconds.
Is WAV to M4R a lossy or lossless conversion?
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If both WAV and M4R are lossless (WAV, FLAC, AIFF), no quality is lost. If M4R 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 M4R output use?
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192 kbps by default for M4R 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 WAV to M4R?
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Yes. ID3 / Vorbis / iTunes-style tags are mapped across formats. Album artwork is preserved when M4R supports it.
Will sample-rate and bit-depth survive the WAV to M4R 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 WAV to mono M4R?
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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) WAV files?
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Yes for M4R 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 WAV files to M4R?
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Yes. Drop a whole folder of WAV files; each becomes a separate M4R and all are zipped for download.
Is the WAV to M4R 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 WAV files?
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No. PDF.to does not attempt to remove DRM. Conversions only succeed on unprotected source files.
Will the M4R I download play on iPhone, Android, and desktop?
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Yes. M4R is supported natively across all major platforms or via universally available codecs. We default to the most-compatible M4R profile.
Are my WAV files private during conversion?
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Yes. Uploads are encrypted in transit, the conversion runs in an isolated worker, and both the WAV and M4R files are deleted within an hour.