Convert MP4 to FLAC
Convert MP4 files to FLAC — free, private, and instant. Runs entirely in your browser, no files are uploaded.
Drop your MP4 files to convert them instantly to FLAC. No uploads — everything runs in your browser. Fast, private conversion with no sign-up, no watermarks, and no file size limits. Save the planet while doing it!
Drop files here or click to browse
Supported formats: MP4, M4A, WAV, OGG, FLAC, WebM, MP3
No data transfer — all data stays on your device!
About the FLAC Format
FLAC (Free Lossless Audio Codec) is an open-source lossless audio compression format. Unlike MP3 or OGG, FLAC compresses audio without any loss of quality — the decoded audio is bit-for-bit identical to the original. FLAC typically reduces file size by 50–70% compared to WAV while preserving perfect fidelity. It is the preferred format for archiving music collections, audiophile listening, and any scenario where quality cannot be compromised. FLAC is widely supported by modern browsers, media players, and streaming platforms.
Features
Near-Zero CO₂
Server-based converters upload your file, process it remotely, and send it back — consuming network and data-centre energy on every request. WebConverter runs entirely on your device, so the only energy used is your local CPU. No data transfer, no server electricity.
Install for Offline Use
WebConverter works offline as a Progressive Web App. Click "Add to Home Screen" on mobile or the install button in your browser's address bar. Once installed, you can convert files without any internet connection.
