Filenary

WAV to MP3 Converter

Convert WAV audio files to MP3 audio right in your browser — free, private and with no size limit.

Drop your file here

or click to browse

Choose File

On first use, a ~30 MB conversion engine is downloaded to your browser (one time only).

This file is processed in your browser and never uploaded to a server.

How to convert WAV to MP3

  1. 1Drop your WAV file into the box above, or click to choose it from your device.
  2. 2Click Convert. The conversion runs locally in your browser — nothing is uploaded.
  3. 3Download your new MP3 file as soon as it's ready.

Why convert WAV to MP3?

WAV files are very large, around 10MB per minute of stereo audio. MP3 plays on every device, car stereo and app, with small file sizes.

Why people make this conversion

CD-quality WAV runs about 10 MB per minute. MP3 delivers the same recording roughly ten times smaller for sharing.

The size math: WAV vs MP3

At typical quality a minute of content weighs about 10.1 MB as WAV and 1.4 MB as MP3 — after conversion your MP3 file comes out about 7.2× smaller.

What is WAV?

WAV is an uncompressed audio format that stores the full sound quality, used in recording and editing.

  • MIME type: audio/wav
  • Developed by: IBM and Microsoft, 1991
  • Uncompressed PCM — CD quality means about 10 MB per minute
  • The recording and editing standard; archive masters stay in WAV

What is MP3?

MP3 is the most popular audio format. It compresses music and speech into small files that play on any device.

  • MIME type: audio/mpeg
  • Standardized: 1993 (MPEG-1 Audio Layer III)
  • Common bitrates: 128–320 kbps
  • Plays on essentially every device made since 1993

Frequently asked questions

Is this WAV to MP3 converter free?
Yes, it's completely free with no sign-up, no watermark and no daily limits.
Are my WAV files uploaded to a server?
No. The conversion happens entirely inside your browser, so your files never leave your device.
Is there a file size limit?
Filenary sets no limit — even files over 1 GB work. The only practical limit is your device's memory.
Will converting WAV to MP3 reduce the quality?
MP3 uses lossy compression, so the file becomes smaller with a small, usually invisible, loss of detail. Settings are tuned to keep the result sharp.
Can I convert several WAV files at once?
This converter handles one file at a time. When it's done, click Start over to convert the next WAV file.
Does it work on iPhone, Android, Mac and Windows?
Yes. It runs in any modern browser — Chrome, Safari, Edge or Firefox — on phones, tablets and computers, with nothing to install.

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Copy the code below and paste it into any page. It's free, needs no sign-up, and files are processed in your visitors' own browsers.