Free online DFF to FLAC converter

Source format

DFF is a DSD audio file format, usually associated with Sony/Philips DSD recordings. It stores a one-bit DSD stream and is often found in SACD rips, archival music collections, and audiophile releases. DFF files are less common than standard PCM formats, so support can be limited in everyday players and editors.

Target format

FLAC is a lossless compressed audio format widely supported by music players, media servers, and editing tools. It reduces file size without changing the decoded audio data, making it a popular choice for archiving and playback. FLAC is especially useful when you want broad compatibility, efficient storage, and metadata support.

How conversion works

DFF to FLAC is not a bit-perfect format copy. DFF stores DSD audio, while FLAC stores PCM audio. Converting between them requires decoding and resampling the DSD stream to PCM, so the result is a high-quality transcode, not preservation of the original DSD data.

If your goal is archival preservation of the original DSD content, keep the .dff file as well as the FLAC copy.

How to convert DFF to FLAC

The most reliable way to convert DFF to FLAC is with desktop audio tools that can decode DSD and export FLAC. A common choice is foobar2000 with the appropriate components. ffmpeg may also work if your build supports DFF input.

Using foobar2000

1. Install foobar2000 on Windows.
2. If needed, add a component that enables DSD/DFF playback and decoding.
3. Open the .dff file in foobar2000.
4. Select the file, then choose File → Convert → ....
5. Pick FLAC as the output format.
6. Adjust FLAC settings if desired, such as compression level and destination folder.
7. Start the conversion and save the resulting .flac file.

Using ffmpeg

1. Install ffmpeg.
2. Run a command such as ffmpeg -i input.dff output.flac.
3. Check the output file in a player that supports FLAC.

If you prefer a simpler workflow, you can also convert the file on 101convert.com for free, without installing any software.

Quality and metadata notes

For best results, use a high-quality decoder and choose an appropriate PCM sample rate if the software allows it. Metadata handling can vary: some tools preserve tags well, while others may drop album art or DSD-specific information. FLAC is usually easier to tag and manage in music libraries than DFF.

Summary

Converting DFF to FLAC improves compatibility while keeping the audio lossless in the PCM domain. foobar2000 is a dependable desktop option, and ffmpeg can be a convenient command-line alternative when supported.