Drop in several files, pick one action — convert to WAV/MP3, or compress each to a target size — and get every result back in a single ZIP download.
The Batch Audio Converter converts a whole folder of audio files to MP3 or WAV in one go and hands you the results as a single ZIP. It is built for libraries, podcast archives, voice-note dumps and anything where converting one at a time would take all afternoon.
Files are processed one after another on your device, with a progress read-out for each, and you can preview any file before or after.
Each file is decoded, optionally resampled/changed to mono, encoded to MP3 (constant bitrate) or WAV, and the encoded bytes are collected into a ZIP using the store method (no further compression, since audio does not compress further). Everything is kept in memory, so very large batches (several GB) are best done in groups.
Convert a whole album folder.
Standardise all episodes to one format.
Convert exports from messaging apps.
Make assets uniform for a video or game.
| Output | MP3 (CBR) or WAV 16/24/32f |
|---|---|
| Packaging | ZIP (store) |
| Naming | Original name + new extension |
No fixed one; memory is the limit.
No, only the audio is converted.
Not in this tool — every file gets the same action and setting. For per-file custom settings, process files individually with the standalone Converter or Compressor.
No fixed limit — the practical ceiling is your device's memory and patience, since every file is decoded and processed one after another in your browser.
This tool runs entirely in your browser using the Web Audio API. Nothing is uploaded, stored or shared — there is no server to send your file to, so it works offline once the page has loaded.
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