How to Convert Audio Files to MP3 (WAV, FLAC, M4A…)
Convert WAV, FLAC, M4A, OGG, WMA, AIFF and other audio files to MP3 in one batch, with the bitrate you choose. Free, in your browser — nothing is uploaded.
3 min read ·
To convert audio to MP3, open the Audio Converter, drop in your files — WAV, FLAC, M4A, OGG, Opus, WMA, AIFF, AMR or even videos — choose MP3, pick a Bitrate, and press Convert. Download each MP3, or Download all (ZIP). Everything is converted in your browser, so nothing is uploaded.
Convert to MP3 step by step
- Open the Audio Converter.
- Add one or more files: click, drop or paste them.
- Under Convert to, choose MP3.
- Choose the Bitrate (192 kbit/s is recommended).
- Optionally tick Mono or choose a Sample rate — usually leave these as they are.
- Press Convert, then download the files individually or all at once as a ZIP.
Which bitrate?
| Bitrate | Quality | About per minute | Best for |
|---|---|---|---|
| 96 kbit/s | Fine for speech | 0.7 MB | Voice notes, audiobooks |
| 128 kbit/s | Good | 1 MB | Podcasts, lectures |
| 192 kbit/s | Very good | 1.4 MB | Music (recommended) |
| 256–320 kbit/s | Excellent | 1.9–2.4 MB | Music you care about |
Higher bitrates can't add detail that isn't in the original — converting a 128 kbit/s file at 320 kbit/s only makes it bigger.
Why MP3?
MP3 plays on absolutely everything: old car stereos, cheap speakers, every phone, every app. Other formats are better in specific ways:
- WAV / FLAC are lossless — keep them as your masters, convert copies to MP3 for listening.
- M4A (AAC) is a little more efficient than MP3 and native on Apple devices.
- Opus is the most efficient for voice.
Common conversions
- WAV to MP3 — shrink recordings from a microphone or DAW to about a tenth of the size.
- FLAC to MP3 — make lossless music fit on a phone or play in the car.
- M4A to MP3 — iPhone voice memos and iTunes files for Android, Windows or older players (see the guide to converting M4A to MP3).
- WMA, AIFF, AMR to MP3 — old Windows files, Mac recordings and phone call recordings into a format anything can play.
- Video to MP3 — drop a video in and only its sound is converted; or use Extract Audio.
Tidy up the files
- Join several files into one MP3 with the Audio Joiner.
- Cut a file into parts or trim silence with the Audio Splitter.
- Reduce hiss and hum with the Audio Noise Reducer.
Converting a whole music library
- Work in batches of a few dozen files, downloading each batch as a ZIP before starting the next.
- Keep the folder structure yourself: the ZIP contains the converted files with their original names, ready to drop back into the album folders.
- Choose one bitrate for the whole library — 192 or 256 kbit/s — so everything sounds consistent.
- Keep the lossless originals (FLAC, WAV) on a backup drive; you can always convert again later, but never the other way round.
Privacy
Files are converted on your device with ffmpeg (WebAssembly). Nothing is uploaded, and there's no sign-up or limit on the number of files.
Frequently asked questions
Are song titles and artist tags kept?
Yes — metadata such as title, artist and album is copied to the MP3 where the original has it.
Can I convert many files at once?
Yes. Add as many as you like; they're converted one after another.
Does it lower the quality?
MP3 is a compressed format, so converting from WAV or FLAC removes detail you're unlikely to hear at 192 kbit/s or more. Keep your originals.