Upload your AMR file and PDF.to re-encodes it into a Opus container with sensible default bitrate and sample-rate. The Opus download is ready in seconds.
Is AMR to Opus a lossy or lossless conversion?
+
If both AMR and Opus are lossless (WAV, FLAC, AIFF), no quality is lost. If Opus 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 Opus output use?
+
192 kbps by default for Opus 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 AMR to Opus?
+
Yes. ID3 / Vorbis / iTunes-style tags are mapped across formats. Album artwork is preserved when Opus supports it.
Will sample-rate and bit-depth survive the AMR to Opus conversion?
Does PDF.to support multi-channel (5.1, 7.1) AMR files?
+
Yes for Opus 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 AMR files to Opus?
+
Yes. Drop a whole folder of AMR files; each becomes a separate Opus and all are zipped for download.
Is the AMR to Opus converter free?
+
Yes, within the free size limit. PRO unlocks much larger files, parallel jobs, and higher bitrates.
