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Fileflect

Audio Converter

Convert audio between MP3, WAV, FLAC, OGG, M4A and AIFF in your browser, without uploading your files.

Processed on your device: your file never leaves your computer

or click to choose them from your device

Up to 50 files, 200 MB max each.

What Audio Converter does

Convert songs, voice notes, podcasts and recordings between the most used formats: MP3 to play anywhere, lossless WAV, FLAC or AIFF to edit or archive, OGG (Opus) for the web and M4A (AAC) for Apple devices. Reads MP3, WAV, FLAC, OGG, Opus, M4A, AAC, WebM and AIFF, and you can choose the quality. The conversion happens on your device: files aren't uploaded to any server.

Limits

  • Up to 50 files at a time, up to 200 MB each.
  • With Pro: files up to 500 MB and up to 500 per batch.
  • A job that takes longer than 15 minutes is stopped so it doesn't freeze your device.
  • Processed in your browser: your files are never uploaded to a server.

Frequently asked questions

Which format should I pick?

MP3 if it must play on any device; M4A (AAC) sounds a bit better at the same size and is Apple's format; OGG (Opus) is the most efficient for the web; WAV and FLAC keep full quality (FLAC takes about half the space of WAV).

Does converting lose quality?

To WAV or FLAC, no: the sound is kept as is (in 16 bits). MP3, M4A and OGG are lossy: 192 kbps is practically indistinguishable from the original for most people; converting from one lossy format to another doesn't bring back what was already lost.

Why can't it read my M4A file?

AAC audio (M4A) is decoded with the browser's codec. Chrome, Edge and Safari read it; some browsers without proprietary codecs don't. In that case you'll see a notice: try another browser.

Is there a limit?

Up to 200 MB per file on the free plan (500 MB with Pro) and 3 hours long, because the result is built in your browser's memory. Only the main audio track is kept; if the file is a video, the picture is ignored.

What is AIFF and when should I use it?

AIFF is Apple's lossless format, the Mac counterpart of WAV used by Logic or GarageBand. Uncompressed AIFF and AIFF-C (8, 16, 24 and 32-bit) are read and AIFF is written in 16 bits; compressed AIFF-C files (μ-law, for example) aren't supported.