Audio to FLAC

Convert AC3, M4A, MP3, OGG, OPUS, PCM, WAV to FLAC online for free

Local-first

Drop files here

or click to select files. Supports MP3, WAV, OGG, AC3, FLAC, OPUS, PCM, M4A.

Compatible with a variety of audio file formats, such as WAV, OGG, AC3, AAC, FLAC, Opus, PCM, M4A, etc., the local browser processes it directly without server upload, ensuring the security of your data. Quickly convert to FLAC format online. Experience the convenient and safe efficient audio format conversion service!

Convert any audio to FLAC online

FLAC is lossless compressed audio — it keeps every bit of the original quality while taking up about half the space of WAV. It is the format of choice for audiophiles, music archiving and Hi-Res libraries. This free tool converts WAV, MP3, M4A, OGG, OPUS and more to FLAC in your browser.

Lossless quality, smaller than WAV

Unlike MP3, FLAC throws nothing away, so a FLAC file is a bit-perfect copy of the source — ideal for archiving CDs and master recordings. Its compression makes files noticeably smaller than WAV without any loss, which is why collectors prefer it for long-term storage.

Runs in your browser, files stay private

Conversion happens entirely on your device with WebAssembly — nothing is uploaded. No sign-up, no watermark and no file limit, so you can archive your whole library to FLAC.

Frequently asked questions

How do I convert audio to FLAC?

Open the tool, drop in your WAV, MP3, M4A, OGG or OPUS file, keep FLAC as the output and click convert. The FLAC is produced in your browser and downloads immediately.

Why convert to FLAC?

FLAC is lossless, so it preserves the full original quality while compressing to about half the size of WAV. That makes it the best format for archiving, audiophile listening and Hi-Res music libraries.

Is the audio to FLAC converter free?

Yes, completely free with no sign-up, no watermark and no limit on the number or size of files you convert.

Does converting MP3 to FLAC improve quality?

No. FLAC is lossless but cannot restore detail already removed by MP3 compression — converting only makes sense from a lossless source like WAV or a CD rip.

Are my audio files uploaded to a server?

No. All processing runs locally in your browser, so your audio never leaves your device.