Measure Formula

WAV to MP3 Converter

Convert WAV files to MP3 privately in your browser. Your audio never leaves your device.

Private by design. Your audio is converted on this device. Measure Formula does not upload or store your files.
Drop WAV files hereor choose files from your deviceWAV files only · up to 100 MB each · processed locally

How to convert WAV to MP3

  1. Choose or drop one or more WAV files.
  2. Select the desired MP3 quality.
  3. Convert locally, then download the completed MP3 files.

Choosing an MP3 quality

A higher bitrate generally keeps more audible detail but produces a larger file. Use 128 kbps for speech and compact files, 192 kbps as a balanced default, 256 kbps for higher-quality music, or 320 kbps when MP3 quality matters more than file size.

WAV versus MP3

WAV commonly stores uncompressed audio and is useful for editing and archival work. MP3 uses lossy compression to reduce file size. Conversion cannot improve the source recording, and converting the MP3 back to WAV cannot recover discarded information.

Browser conversion limits

Conversion capacity depends on your device’s memory and browser. This version limits accepted WAV files to 100 MB each; that limit is a safety boundary, not a promise that every device can process a file of that size. Unusually encoded or damaged files may still fail. Keep the original WAV until you have checked the downloaded MP3.

MP3 encoding is powered locally by the open-source LAME encoder.

Frequently asked questions

How do I convert WAV to MP3?

Choose one or more WAV files, select an MP3 quality, choose Convert to MP3, then download each completed file.

Are my WAV files uploaded?

No. Conversion happens on your device. Measure Formula does not receive or store the contents or filenames of your audio files.

Is this WAV to MP3 converter free?

Yes. The converter requires no account, payment or watermark.

Which MP3 bitrate should I choose?

Use 128 kbps for speech or a smaller file, 192 kbps for a balanced default, 256 kbps for higher-quality music, or 320 kbps for the largest and highest-bitrate MP3 option.

Does converting WAV to MP3 reduce quality?

Usually. MP3 uses lossy compression, so conversion removes some audio information to make the file smaller. Keep the original WAV for editing or archival use.

Can I convert several WAV files at once?

Yes. Select or drop multiple WAV files and the converter will process the valid files in sequence.

Does it work on phones and computers?

It works in current browsers that support the required audio and WebAssembly features. Available memory and download handling vary by device and browser.

Why did my WAV file fail to convert?

The file may be corrupt, empty, too large, or use an uncommon WAV encoding the browser converter cannot decode.

What is the maximum file size?

This version limits accepted files to 100 MB each. Actual conversion capacity depends on available device memory and the file's duration and encoding.

Should I delete the original WAV?

Keep it when you may edit, reprocess or archive the audio. Converting an MP3 back to WAV cannot restore information removed during MP3 compression.