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AUDIO CONVERTERS · ON YOUR DEVICE

MP3 to FLAC

Transcode MP3 audio into genuine FLAC files on your device.

Ready to use

Opening your local audio workspace…

How to use MP3 to FLAC

  1. Open a local recording.

    Choose or drop a supported file. We detect its container and probe its actual audio codec. Preview and inspect duration, sample rate and channels.

  2. Choose your settings.

    Transcode MP3 audio into genuine FLAC files on your device. Use the waveform for a time selection where relevant. Effects operate on real decoded audio samples.

  3. Process, compare and download.

    Processing runs in a local worker. The result is checked for its actual container, codec and decodability before a download appears. Compare at a similar playback volume.

Supported scope and limitations

Local single-thread WebAssembly engine; first use downloads about 31 MiB of static engine assets. No audio is uploaded.

Up to 32 MiB total input, 10 minutes, mono/stereo, and a 96 MiB decoded float-memory budget (32 MiB on reported low-memory devices). Actual limits can be lower. No DRM or encrypted containers.

Browser and format-variant coverage is limited. Review the result before deleting an original. Lossy-to-lossless conversion cannot recover missing detail.

Are my recordings uploaded?

No. The host delivers code and WebAssembly assets. Audio data, filenames, metadata, processing settings and microphone recordings are not sent to a conversion server or analytics.

Will this improve the quality of every recording?

Results depend on the original. Converting MP3 to WAV or FLAC does not restore lost detail. Noise reduction cannot reliably separate overlapping speakers, and strong effects can introduce artifacts. Keep your original.

Why can the output be larger or sound different?

Bitrate, codec, channels, sample rate and effect settings change the result. Lossless formats can be much larger than compressed inputs. Lossy codecs may add encoder padding or overshoot a PCM peak ceiling.

Keep working with your sound