Audio Format Converter

Add files, or add a folder and every audio file inside is picked up. Files the browser cannot decode are skipped, so one odd file does not stop the batch.

The batch runs several files in parallel, sized to what your device can handle. The Files card marks each file Pending, Converting, Done or Failed, with its size before and after.

MP3 plays everywhere; WAV is uncompressed and suits editing; FLAC is lossless at a smaller size; M4A and AAC suit Apple devices; OGG suits the web and games. M4A, AAC and OGG appear when your browser provides those encoders.

For MP3 and other compressed formats, choose the bitrate; for WAV and FLAC, choose 16-bit, 24-bit or 32-bit float. One setting applies to the whole batch.

Select a file in the Files card to play it in the preview, with a waveform per channel, a level meter and a spectrum. Once it is converted, switch between Original and Result; the player stays at the same moment.

Only the selected file is loaded into the player, so even a large folder does not fill your device's memory.

Converting to WAV or FLAC keeps every sample of the source. Converting to MP3, M4A, AAC or OGG encodes the audio again and removes some detail; a higher bitrate removes less.

Converting a lossy file such as an MP3 to WAV does not restore quality: the WAV is an exact copy of the MP3's sound, just larger and easier to edit.

To make files smaller rather than just change the format, use the Audio Compressor, which also lowers the sample rate and channels.

To cut, join or level the audio, use the Audio Trimmer, the Audio Joiner or the Audio Normalizer.