Audio Tools
WAV to MP3 Converter
Convert WAV audio files to MP3 format with adjustable audio quality. 100% client-side — your file never leaves your device.
Runs entirely in your browser — your audio never leaves this device
Private & client-side
Your audio files are processed locally in your browser whenever supported. Files are not uploaded to our servers.
Drop your audio file here
or click to choose from your device
Choose Audio FileWAV to MP3: smaller files that play everywhere
WAV recordings from microphones, audio interfaces, field recorders and editing software are large: a single hour of stereo audio can exceed 600 MB. MP3 makes the same recording roughly ten times smaller with quality that most listeners cannot tell apart at a good bitrate, which is why it is still the standard for sharing, podcasts and music players.
FlashFile encodes a real MP3 file in your browser, and you choose the bitrate to balance quality and size.
Common uses
Podcasts and interviews
Prepare episodes for hosting platforms and listeners.
Sharing recordings
Send rehearsals, lectures and voice notes that are small enough for email and chat.
Music players and cars
Play recordings on devices that prefer MP3.
Websites
Publish audio that streams quickly for visitors.
Choosing a bitrate
192 kbps is a good default for music. 320 kbps gives the highest MP3 quality, and 128 kbps suits speech and smaller files. Higher bitrates mean larger files.
Keep your WAV masters
MP3 is lossy. Keep the original WAV files if you might edit or remaster the audio later, and create MP3 copies for distribution.
Questions
Frequently asked questions
Is the WAV to MP3 converter free?
Yes. It is completely free, with no sign-up and no limits.
Are my audio files uploaded to a server?
No. Your WAV is decoded and encoded into MP3 entirely in your browser using a pure-JS MP3 encoder. The file never leaves your device.
Is this a real MP3 file or just a renamed WAV?
It is a real MP3 file. The WAV is decoded into raw audio and re-encoded with a genuine MP3 encoder, so the output is a valid, playable MP3.
Which bitrate should I choose?
192 kbps is a good default that balances quality and file size. Choose 320 kbps for the best quality, or 128 kbps for the smallest file.