How much smaller is an MP3 than a WAV?

Much smaller. A WAV stores uncompressed samples, while an MP3 keeps only what the bitrate allows, so the saving depends on the bitrate you pick. Lower bitrates give smaller files and less detail.

Which bitrate should I use?

Higher bitrates sound closer to the original. For music, a higher setting is a safe choice; for speech, such as voice memos and podcasts, a lower one usually sounds fine.

Are my files uploaded anywhere?

No. Every live tool on JustYourConvert opens and converts your files inside your browser, on your own device. Nothing is sent to our servers, and the result is saved straight from your browser.

Is JustYourConvert free?

Yes. Every tool is free, with no sign-up, no watermark and no daily limit. Clearly labeled ads keep it that way.

Is there a file size limit?

Only your device's memory. Because the work happens in your browser, very large files can be slow on phones and older computers. Each tool says its practical limit under the drop area.

WAV to MP3 Converter

Shrink big WAV recordings into MP3s that play anywhere.

100% Free
No Sign Up
Nothing Uploaded

WAV to MP3

Shrink uncompressed WAV recordings into MP3 files

Drag & drop an audio file

or click to browse. You can also paste.

WAV, or any audio, up to your device's memory.

Bitrate

192 kbps is near-transparent for most music.

Result-

Processed on your device. Nothing is uploaded.

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How to convert WAV to MP3

Three steps, all in your browser.

1
Add your audio
Drop or choose an audio file.
2
Choose settings
Pick the format and quality.
3
Download
Save the converted file.

WAV to MP3 Converter: what to know

WAV files store audio as raw, uncompressed samples. That makes them exact and easy for editing software to work with, but also large: a few minutes of stereo CD-quality audio takes tens of megabytes. MP3 is a lossy format that removes sounds the ear is unlikely to notice, shrinking files many times over while still playing on practically every device.

This tool decodes your WAV in the browser and encodes it as MP3 with LAME, a long-established open-source MP3 encoder, compiled to WebAssembly. The bitrate you choose sets the trade-off: higher bitrates sound closer to the original and take more space, lower ones save more space and lose more detail. Your recording never leaves your device.

WAV is the ideal source for MP3 because nothing has been compressed yet, so you get the best possible MP3 at any bitrate. Mono recordings, such as voice memos, can use a lower bitrate than stereo music. Very long recordings take more memory to process, so a computer handles them more comfortably than a phone.

Popular uses

Sharing studio or field recordings
Emailing voice recordings and interviews
Saving space on phones and music players
Publishing podcasts and audiobooks

Tips for the best result

Keep the WAV as your master and share the MP3.
A higher bitrate is a safe choice for music you care about.
Speech stays clear at lower bitrates than music needs.
Convert stereo voice recordings to mono to halve the data needed at the same quality.

Read how JustYourConvert works and our privacy details. Keep your original files and check a converted file before you replace anything.