Will quality be lost?

Yes — MP3 is lossy. At 256 kbps or higher the loss is generally inaudible. Keep the FLAC original for archival.

Why convert FLAC to MP3?

For phones, car stereos, Bluetooth speakers, and older players that don't support FLAC, plus to save storage space — MP3 files are 4–5× smaller.

No. ffmpeg.wasm decodes and re-encodes locally inside your browser. Nothing leaves your device.

ffmpeg.wasm (~25 MB) is downloaded on the first run and then cached by your browser. Subsequent conversions are fast.

Convert lossless FLAC audio to MP3 at 128–320 kbps using ffmpeg.wasm in your browser. No upload, no account, saves 4–5× storage space.

100% client-side · no upload

FLAC audio file

Settings MP3 bitrate

Load a file to begin.

Pick your .flac file using the file picker.
Choose the MP3 bitrate (256 kbps is a good default for high quality).
Click Convert to MP3 and download. ffmpeg.wasm loads once and is cached by your browser.

Will quality be lost?: Yes — MP3 is lossy. At 256 kbps or higher the loss is generally inaudible. Keep the FLAC original for archival.
Why convert FLAC to MP3?: For phones, car stereos, Bluetooth speakers, and older players that don't support FLAC, plus to save storage space — MP3 files are 4–5× smaller.
Are my files uploaded?: No. ffmpeg.wasm decodes and re-encodes locally inside your browser. Nothing leaves your device.
Why does the first conversion take longer?: ffmpeg.wasm (~25 MB) is downloaded on the first run and then cached by your browser. Subsequent conversions are fast.

Last updated: 2026-05-20 By jarvisbox