BeneficConvert Audio
Re-encode your audio to FLAC, ALAC, WAV, AAC, or Opus — entirely in your browser.
Drop a file, pick an output format and quality, and download. Everything runs locally — your audio never leaves your device.
Output formats
FLAC ALAC WAV AAC Opus
Accepted inputs
FLAC ALAC MP3 WAV DSF Ogg Opus AAC AIFF M4A
Frequently asked questions
Everything you might wonder about converting audio in Benefic.
What does the converter do?
It decodes your source audio and re-encodes it into the output format you pick. Supported outputs are FLAC (24-bit by default), ALAC, WAV (16- or 24-bit PCM), AAC, and Opus. The source audio is decoded in the browser — nothing is uploaded.
Which input formats are supported?
Anything Symphonia can decode in the browser: FLAC, ALAC, MP3, WAV, DSF (DSD), Ogg Vorbis, Opus, AAC (ADTS or M4A), and AIFF. The output format is independent of the input — e.g. MP3 → FLAC, DSF → FLAC, WAV → Opus.
Is there quality loss?
Going from a lossless source to a lossless target (FLAC, ALAC, WAV) is bit-identical in PCM. Going from a lossy source (MP3, AAC, Opus, Vorbis) to a lossless target cannot recover detail that was thrown away at the original encode. Going to a lossy target (AAC, Opus) always re-encodes and will introduce a generation of artifacts.
Do my audio files get uploaded to a server?
No. The converter runs entirely in your browser as WebAssembly. Your audio is decoded, re-encoded, and handed back to you locally — nothing is sent over the network.
Does it work offline?
Yes, once the page has loaded. The converter is a static page plus a WebAssembly module — after the first visit it will run without a network connection.
Is the audio converter free to use?
Yes. It is free, requires no account, and has no upload or usage limits. Because it runs client-side there is no infrastructure cost to pass on.