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Audio Converter

Decode one local audio file and download a real MP3 or WAV without uploading it.

Audio and output

Your data stays in this browser.

The file is processed locally and is not uploaded.

MP3, WAV, Ogg or WebM audio · up to 25 MB and 5 minutes · browser codec support required.

Result

Choose a supported file to create a new result.

How to convert audio

  1. Choose one local MP3, WAV, Ogg or WebM audio file. Its bytes are checked before decoding.
  2. Choose MP3 at 128 kbps for a smaller sharing file or WAV 16-bit PCM for an uncompressed editing file.
  3. Convert, listen to the new result, and download it. Changing the file or format removes the old output.

What this converter does

The browser decodes one supported audio stream and writes new audio bytes rather than renaming the extension. MP3 is convenient for sharing; WAV PCM is larger and useful when another editor needs uncompressed samples.

Limits and input

Files are limited to 25 MB and decoded audio to 5 minutes. MP3, RIFF/WAVE, Ogg and WebM signatures are recognized, but the browser must also decode the codec. The tool does not promise every audio format, video extraction, recording, trimming, tags, batches or cloud storage.

Output details

MP3 uses up to two channels, the decoded sample rate and 128 kbps. WAV uses 16-bit little-endian PCM and up to two channels. More-than-stereo sources use their first two decoded channels; the page reports this limitation. Neither output improves a poor source.

Examples

A 30-second stereo WAV at 44.1 kHz can become a much smaller 128 kbps MP3. A short MP3 can become a WAV for software that accepts PCM; that WAV is usually larger and does not restore detail already lost by MP3 compression.

Errors and retries

A renamed file or unsupported codec is rejected. Very long or large files are stopped before encoding. If conversion is cancelled or the output format changes, the prior player and download are removed so they cannot be mistaken for the new selection.

FAQ

Does conversion improve quality? No. Is WAV always better? It is uncompressed but larger; source detail cannot be recovered. Is audio uploaded? No. Are tags copied? No. Can this extract audio from video or record a microphone? No.