The φCoherent audio codec is lossless: it shrinks audio with no change to a single sample. Here it runs in your browser against FLAC at its strongest setting (-8), the standard for lossless audio. Pick a clip, drop in a WAV, or record yourself, then play the original against the decoded round-trip and hear for yourself that nothing was lost.
Everything runs locally via WebAssembly. Nothing you load or record is uploaded. On our benchmark corpus the φ codec is 4 to 6% smaller than FLAC‑8 across mono, stereo, and multichannel. It trades encode speed for ratio.
No audio yet. Pick a clip above, drop in a WAV, or record from your microphone.
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The .pea is the φ‑compressed file; it opens only with the φ codec. The decoded WAV is the bit‑identical reconstruction, so you can compare it to your original outside the browser.
The φ result is computed live in phi-compress-audio (WebAssembly), the same codec we ship, at quality 1 (lossless). FLAC‑8 sizes for the built-in clips are measured offline with the reference flac --best encoder and shown for comparison; for your own WAV or microphone audio, only the φ ratio against the raw PCM is shown. Sizes are the audio payload (PCM data vs each codec's compressed stream). The φ codec is optimized for size, not throughput.