How to Convert Audio to MP3
MP3 still plays on absolutely everything, and it keeps files small. Here is how to convert WAV, M4A, FLAC, and other formats to MP3 — and how to choose a bitrate that sounds good without bloating the file.
Updated June 5, 2026
Why MP3 is still the safe choice
MP3 is the most universally compatible audio format there is. Every phone, car stereo, smart speaker, browser, and media player handles it. It is also efficient: an MP3 is a fraction of the size of an uncompressed WAV, which makes it ideal for sharing, podcasts, and filling a device with music. When you need audio that simply works anywhere, MP3 is the dependable target.
Understand your source first
What you start with shapes what to expect. WAV is uncompressed — large but pristine, so converting to MP3 dramatically shrinks it. FLAC is lossless compression — smaller than WAV with identical quality, and converting to MP3 trades some of that fidelity for compatibility and size. M4A (usually AAC) and OGG/Opus are already lossy; converting them to MP3 is fine for compatibility, but you cannot recover detail that was discarded when they were first encoded.
Bitrate: the dial that controls quality and size
An MP3's bitrate, measured in kbps, sets how much data per second it uses — higher means better sound and a bigger file. A quick guide:
- 320 kbps: near-transparent; the choice for music you care about.
- 192–256 kbps: an excellent balance for general listening.
- 128 kbps: acceptable for speech and podcasts, noticeably weaker for music.
Converting a lossy source (like M4A) up to 320 kbps will not improve it — the lost detail is already gone — but it also will not make it worse. When the source is lossless (WAV or FLAC), the bitrate you pick genuinely determines the quality you keep.
Converting more than one file
If you have an album or a batch of recordings, look for a converter that processes several files in a row rather than forcing you to do them one at a time. Keeping a consistent bitrate across the batch makes for a tidy, predictable result.
Keep your audio private
Recordings can be personal — voice memos, interviews, unreleased tracks. Converting in the browser keeps every file on your own device; nothing is uploaded, so there is no copy on a server to worry about. It is the simplest way to convert sensitive audio with peace of mind.
Quick steps
- 1Open the audio converter and drop your WAV, M4A, FLAC, or other file onto the page.
- 2The output is set to MP3. Choose a bitrate — 320 kbps for music, lower for speech to save space.
- 3Convert and download. The audio is processed locally in your browser and never uploaded.
Frequently asked questions
Use 320 kbps for music you care about, 192–256 kbps for everyday listening, and 128 kbps for speech or podcasts where small size matters more than fidelity.
MP3 is lossy, so some data is discarded compared to a lossless WAV or FLAC source. At a high bitrate like 320 kbps the difference is inaudible to most listeners, while the file becomes far smaller.
Yes. A browser-based converter processes the audio entirely on your device, so personal recordings and unreleased tracks never leave your computer or get stored on a server.