Is this audio converter free?

Yes. Convert audio for free with no account, watermark, or upload limit.

Are my files uploaded to a server?

No. FFmpeg runs in your browser via WebAssembly. Your audio never leaves your device.

MP3 to FLAC Converter — Free Online

Drop audio hereMP3, WAV, OGG, FLAC, M4A, AAC, WebM

File name

.flac

Downloads as audio.flac

Convert to

Lossless output. Bitrate preset does not apply to FLAC.

Drop an audio file to convert.

Notice: Your files are processed 100% locally in your browser and are not saved to any database. Please download your files once editing is complete to prevent losing your work.

Re-wrap MP3 as FLAC when you need a lossless container.

Best for this page

Re-wrap MP3 as FLAC when you need a lossless container
Upload your source file when you want a focused mp3 to flac converter workflow.
Try MP3 to WAV converter if your file type, format, or use case is slightly different.

How to use

Upload your source file.
Choose output format and quality preset.
Download the converted file when FFmpeg finishes.

Tips for better results

Choose output format and quality preset before downloading so the result matches the place you plan to use it.
Keep the original file until you have opened and checked the downloaded result.
For large files, leave this browser tab open until the progress message says the work is complete.

Limits to know

Very large files can take longer because mp3 to flac converter work happens in your browser when possible.
Refreshing or closing the tab can clear unsaved work, so download the finished file before leaving.
Some older apps only accept common formats, so use a related converter page if the first export is not accepted.

FAQ

Is this audio converter free?: Yes. Convert audio for free with no account, watermark, or upload limit.
Are my files uploaded to a server?: No. FFmpeg runs in your browser via WebAssembly. Your audio never leaves your device.