Is 320 kbps worth it?

For archiving or for critical listening on good headphones, yes. For everyday playback the difference from 192 kbps VBR is very hard to hear.

Does converting WAV to MP3 in the browser upload my file?

It depends on the tool. Some sites upload to a server and convert there; others run the encoder inside your browser so the file never leaves your device. Check the site's privacy statement.

AAC (M4A) sounds slightly better at the same bitrate and is native on Apple devices. MP3 plays absolutely everywhere. For maximum compatibility choose MP3.

Guides

WAV to MP3: which bitrate, and when not to convert at all

Turn uncompressed WAV into MP3 without guessing. Bitrate, CBR vs VBR, sample rate, tags, and the cases where you should keep the WAV.

Updated 2026-09-19

A five-minute stereo WAV at 44.1 kHz is about 50 MB. The same audio as a 192 kbps MP3 is about 7 MB and, for most listeners on most equipment, indistinguishable. The conversion itself is a one-click job; the decisions around it are what this guide covers.

Bitrate: the only setting that really matters

128 kbps is the floor for music you will listen to more than once; it is fine for speech. 192 kbps is the sensible default for music. 256–320 kbps is for archiving a master you no longer have the WAV for, or for content with lots of cymbals and reverb tails, which expose MP3 artefacts first.

VBR (variable bitrate) lets the encoder spend more bits on complex passages and fewer on silence. LAME's V2 preset averages roughly 190 kbps and is the best size-to-quality trade for music. Use CBR only when a device or platform demands a fixed bitrate.

Sample rate and channels

Keep the sample rate of the source unless you have a reason not to. Downsampling 48 kHz to 44.1 kHz for a phone ringtone is fine; upsampling never adds quality. A mono voice recording should stay mono — a stereo MP3 of a mono source wastes half the bitrate on an identical second channel.

When to keep the WAV

If you will edit the audio again, keep the WAV (or convert to FLAC, which is lossless and about half the size). Every generation of MP3 encoding removes detail, and effects such as pitch shifting or noise reduction expose artefacts that were inaudible in the original. Convert to MP3 only for the copy you deliver.

Also keep the WAV if the destination is video editing software: NLEs decode MP3 fine, but they cut more cleanly on uncompressed audio.

Tags and file names

WAV has poor metadata support, so a converted MP3 usually arrives with no title, artist or album. Fill them in during conversion; phones and car stereos sort by tags, not by file names.

Step by step

1
Decide what the MP3 is for
Listening copy: 192 kbps VBR. Speech only: 96–128 kbps mono. Archive with no WAV left: 320 kbps.
2
Keep sample rate and channels
Match the source unless the destination requires otherwise.
3
Add tags
Title, artist and album at minimum; add artwork if the player shows it.
4
Convert and spot-check
Listen to a loud, busy passage and a quiet fade. If either sounds swishy or grainy, go one bitrate step up.

Questions

Is 320 kbps worth it?: For archiving or for critical listening on good headphones, yes. For everyday playback the difference from 192 kbps VBR is very hard to hear.
Does converting WAV to MP3 in the browser upload my file?: It depends on the tool. Some sites upload to a server and convert there; others run the encoder inside your browser so the file never leaves your device. Check the site's privacy statement.
MP3 or AAC?: AAC (M4A) sounds slightly better at the same bitrate and is native on Apple devices. MP3 plays absolutely everywhere. For maximum compatibility choose MP3.