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Audio Format Converter

Got a WAV that is too big to email, or an OPUS voice note your editor will not open? Change the format of one file or a whole batch, choose the quality, and download everything in a single ZIP.

Using the Audio Format Converter

1

Add your files

Select as many audio files as you like. Mixed formats in one batch are fine.

2

Choose the target

Pick MP3, WAV, M4A, FLAC, OGG or OPUS and set the quality where the format allows it.

3

Collect the results

Preview each file, save them one by one or take the whole set as a ZIP archive.

Pick the right format

Lossless formats keep every detail; lossy formats trade a little detail for much smaller files.

FormatTypeTypical use
WAVLossless, uncompressedEditing, mastering
FLACLossless, compressedArchiving music
MP3LossyPlays everywhere
M4A (AAC)LossyApple devices, phones
OGGLossyGames, open software
OPUSLossyVoice, streaming, small size

Audio Format Converter Questions & Answers

Is there a limit on how many files I can convert?
No fixed limit. Files are processed one after another, so a long list simply takes a little longer.
Will converting MP3 to WAV improve the sound?
No. WAV stores the same sound without further loss, which is useful for editing, but it cannot restore what MP3 already removed.
What is the smallest format for speech?
OPUS keeps voices clear at very low bitrates, which makes it great for long recordings.
Do my files get uploaded?
No. The conversion engine runs in your browser. The first run downloads the engine once; after that it is cached.

Lossless or Lossy? A Short Guide to Audio Formats

Audio formats fall into two families. Lossless formats such as WAV and FLAC keep the sound exactly as recorded. Lossy formats such as MP3, AAC (M4A), OGG and OPUS throw away parts of the signal that people rarely notice, which makes the file many times smaller.

When to keep it lossless

If you will edit, mix or master the audio later, stay with WAV or FLAC. Each time a lossy file is decoded and saved again, a little more quality is lost, so it pays to keep a lossless master.

When small files matter

For sharing, uploading or listening on the go, a lossy format is the practical choice. MP3 plays on every device. M4A is the native choice on iPhones. OPUS gives the best quality for the size, especially for voices.

Batch work in one go

Drop an entire album or a folder of interview takes into the converter, pick one target format, and download a single ZIP. Want to join the converted tracks? Continue with the Audio Merger. To trim a single file, use the MP3 Cutter.

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