Upload your MP3 file and PDF.to re-encodes it into a FLAC container with sensible default bitrate and sample-rate. The FLAC download is ready in seconds.
Is MP3 to FLAC a lossy or lossless conversion?
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If both MP3 and FLAC are lossless (WAV, FLAC, AIFF), no quality is lost. If FLAC 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 FLAC output use?
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192 kbps by default for FLAC 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 MP3 to FLAC?
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Yes. ID3 / Vorbis / iTunes-style tags are mapped across formats. Album artwork is preserved when FLAC supports it.
Will sample-rate and bit-depth survive the MP3 to FLAC conversion?
Does PDF.to support multi-channel (5.1, 7.1) MP3 files?
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Yes for FLAC 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 MP3 files to FLAC?
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Yes. Drop a whole folder of MP3 files; each becomes a separate FLAC and all are zipped for download.
Is the MP3 to FLAC converter free?
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Yes, within the free size limit. PRO unlocks much larger files, parallel jobs, and higher bitrates.
