Audio Converter

Convert MP3, WAV, OGG, M4A and FLAC into MP3, WAV or OGG. Free, fast, and your files never leave your device.

Drop an audio file here or click to choose

Supported input: MP3, WAV, OGG, M4A, FLAC

How to use the Audio Converter

  1. Drop an audio file (MP3, WAV, OGG, M4A or FLAC) into the box above, or click to browse.
  2. Pick your target format — MP3, WAV or OGG.
  3. For MP3, choose a bitrate from 128 to 320 kbps to balance size and quality.
  4. Click Convert. The first run downloads the converter engine (about 32 MB, cached for next time).
  5. When it finishes, click Download result to save the converted file.

Why use ZillaKit's Audio Converter?

Everything happens inside your browser. Your audio is decoded and re-encoded on your own device using a WebAssembly build of FFmpeg, so your files never leave your computer and nothing is uploaded to a server. That means real privacy for voice memos, music, podcasts and recordings, plus no waiting in an upload queue. There is no signup, no watermark and no email required. The converter supports lossy and lossless inputs, lets you set the exact MP3 bitrate you want, and works on desktop and mobile. Because the heavy lifting runs locally, conversion speed depends on your device rather than someone else's overloaded server. It is completely free to use, with a generous daily allowance, and the engine is cached after the first load so repeat conversions start almost instantly.

FAQ

Are my audio files uploaded anywhere?

No. All decoding and encoding happens locally in your browser using FFmpeg compiled to WebAssembly. Your files never leave your device.

Why does the first conversion take a moment to start?

The first run downloads the converter engine, roughly 32 MB. Your browser caches it, so every conversion after that starts much faster.

Which formats can I convert between?

You can bring in MP3, WAV, OGG, M4A or FLAC, and export to MP3, WAV or OGG. MP3 export lets you pick a bitrate from 128 to 320 kbps.

Is there a file size limit?

There is no hard limit, but very large files can exhaust the memory a browser tab is allowed to use. We recommend keeping files under about 200 MB. If a large file fails, try converting on a desktop browser.

Does converting to a higher MP3 bitrate improve a low-quality source?

No. Re-encoding cannot add detail that was already lost. A higher bitrate only preserves what is there and makes the file larger, so match the bitrate to your source quality.