NoCloud Media

Audio tool

Audio Converter

Convert audio between MP3, WAV, OGG, M4A, and FLAC. Runs in your browser — your file never leaves this tab.

How it works

  1. 1

    Drop your audio file

    MP3, WAV, OGG, M4A, FLAC, or AAC. Stays on your device.

  2. 2

    Pick an output format

    MP3 for sharing, WAV for editing, OGG for size, M4A for Apple, FLAC for lossless archive.

  3. 3

    Convert in your browser

    FFmpeg.wasm runs locally. No uploads, no server queues.

  4. 4

    Download the converted audio

    Same audio, new format. Original stays untouched.

Why use Audio converter?

Private — your audio never leaves your browser, so sensitive recordings (interviews, voice memos, private music) can be converted without trusting a server.

Complete — supports the five audio formats people actually need, lossy and lossless, with sensible bitrate options for each lossy encoder.

Fast once loaded — the first conversion downloads FFmpeg core (~30 MB, cached); every conversion after that starts instantly.

Common use cases

  • Convert a voice memo from M4A to MP3 for easier sharing
  • Turn a FLAC archive into MP3 for your phone
  • Save an OGG Vorbis file as WAV for editing in a DAW
  • Convert an AAC file to MP3 for a device that doesn't support AAC
  • Re-encode a WAV at 320 kbps MP3 to slash file size
  • Archive a CD rip as FLAC for lossless backup

About MP3 and MP3

Audio formats fall into two camps: lossless (WAV, FLAC) preserves every bit of the original; lossy (MP3, OGG, M4A/AAC) throws away data to shrink the file. Within lossy, higher bitrates sound better at the cost of file size. MP3 at 320 kbps is effectively indistinguishable from lossless for most listeners. FLAC is typically 40–60% smaller than WAV with no quality difference. Converting between two lossy formats always incurs some quality loss; converting lossless → lossy is common and expected; lossless → lossless is fine.

Frequently asked questions

Is my file uploaded to a server?
No. NoCloud Media converts your audio entirely in your browser using WebAssembly. Your file never leaves this tab.
Will I lose quality converting between formats?
Converting to a lossless format (WAV, FLAC) is bit-preserving relative to the source. Converting to a lossy format (MP3, OGG, M4A) always loses some detail. Converting between two lossy formats compounds quality loss — avoid it when you can.
Should I use FLAC or WAV for lossless?
FLAC. It's typically 40–60% smaller than WAV at identical quality because it uses lossless compression. Every player that matters supports it. WAV only has an edge if you're handing the file to very old software.
What bitrate should I pick for MP3?
192 kbps is a good default for most use cases. 320 kbps sounds indistinguishable from lossless to nearly everyone. 128 kbps is fine for voice and small file sizes.
What's the maximum file size?
It depends on your browser's available memory. Files up to 500MB work smoothly on most devices; files up to ~2GB may work on desktop browsers with enough RAM.
Which browsers are supported?
Chrome, Edge, Firefox, and Safari 15+. We require WebAssembly and SharedArrayBuffer, both standard in modern browsers.

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