How to Convert Audio to MP3
WAV, FLAC, OGG, and M4A to MP3 — free and private ~7 min read
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Open Audio ConverterWhy Convert to MP3?
MP3 remains the most universally compatible audio format ever created. Every phone, computer, car stereo, smart speaker, and media player supports it. When you need an audio file that just works everywhere, MP3 is the answer.
The trade-off is quality: MP3 is a lossy format that permanently discards some audio data to shrink file sizes. At high bitrates (256–320 kbps), the quality loss is virtually inaudible. At lower bitrates, artifacts become noticeable.
Rule of thumb: If your goal is maximum compatibility and reasonable file size, convert to MP3 at 320 kbps. If you need perfect quality, keep the file lossless (WAV or FLAC).
WAV to MP3
WAV files are uncompressed studio-quality audio — and they're huge. A 4-minute song at CD quality is roughly 40 MB as WAV but only ~9 MB as MP3 at 320 kbps. That's a 4x size reduction.
When to convert WAV to MP3: Sharing files via email or messaging, uploading to platforms that don't need lossless, or freeing up storage. Always keep your original WAV as a lossless master.
Recommended: 320 kbps for music, 192 kbps for podcasts/speech, 128 kbps for voice memos where size matters most.
FLAC to MP3
FLAC is already compressed losslessly — about half the size of WAV with identical quality. Converting FLAC to MP3 shrinks files further: a 20 MB FLAC becomes ~9 MB as MP3 at 320 kbps.
When to convert FLAC to MP3: Loading music onto devices with limited storage, sharing with people who don't have FLAC-compatible players, or creating a portable copy of your lossless archive.
Since you're going from lossless to lossy, the MP3 is the only point where quality is lost. Your original FLAC is a perfect source — no generation loss concerns.
OGG to MP3
OGG Vorbis is an open-source lossy codec used by Spotify and many games. It generally outperforms MP3 at equivalent bitrates, but not all devices support OGG natively — especially iOS devices and some car stereos.
Warning — generation loss: Both OGG and MP3 are lossy. Converting OGG to MP3 re-encodes already-compressed audio, causing additional quality degradation. If you have a lossless original, convert from that instead.
When to convert OGG to MP3: When you only have OGG files and need them to play on devices that don't support OGG. Use the highest MP3 bitrate (320 kbps) to minimize additional loss.
M4A to MP3
M4A is a container format — the .m4a extension can hold two very different codecs:
AAC in M4A
Most common. Used by Apple Music, YouTube, and iTunes purchases. Converting AAC to MP3 is lossy-to-lossy — there will be some generation loss.
ALAC in M4A
Apple Lossless. Converting ALAC to MP3 is lossless-to-lossy — the MP3 is the only point of quality loss, just like converting from WAV or FLAC.
When to convert M4A to MP3: When you need the files to play on non-Apple devices or older hardware that doesn't recognize .m4a files. Use 320 kbps to preserve maximum quality.
Recommended MP3 Bitrate Settings
The bitrate you choose determines the balance between file size and audio quality:
320 kbps — Near-transparent quality. Most people can't tell it from lossless. Best for music you care about.
256 kbps — Excellent quality at a smaller file size. A good default for most uses.
192 kbps — Good balance. Fine for casual listening, podcasts, and sharing. Quality loss barely noticeable on most equipment.
128 kbps — Smallest practical file size. Acceptable for speech and voice memos. Quality loss audible on good speakers.
How to Convert to MP3 (3 Steps)
Upload your audio file
Go to the Audio Converter and drag & drop your WAV, FLAC, OGG, or M4A file. Up to 3 files at once, 250 MB each.
Select MP3 and choose your bitrate
Pick MP3 as the output format. Choose 320 kbps for best quality, or lower for smaller files.
Download your MP3
Click Convert and download. Everything runs in your browser — your files are never uploaded anywhere.
Frequently Asked Questions
Does converting WAV to MP3 lose quality?
Yes — MP3 is a lossy format that permanently discards some audio data to reduce file size. At 320 kbps, the quality loss is virtually inaudible to most listeners. At 128 kbps, the difference becomes noticeable on good speakers. Always keep your original WAV file as a lossless backup.
What is the best MP3 bitrate?
320 kbps is the highest MP3 bitrate and sounds nearly identical to lossless. 192 kbps is a good middle ground. 128 kbps is acceptable for speech, podcasts, or when file size is critical. Below 128 kbps, quality degrades noticeably.
Can I convert FLAC to MP3 without losing quality?
Some quality loss is inherent when going from lossless (FLAC) to lossy (MP3). However, at 320 kbps the difference is inaudible in most blind tests. The advantage is a dramatic file size reduction — a 20 MB FLAC becomes roughly 9 MB as MP3.
Is OGG to MP3 conversion lossy-to-lossy?
Yes. Both OGG Vorbis and MP3 are lossy formats. Converting between them causes generation loss — additional quality degradation on top of what was already lost. If possible, convert from a lossless source (WAV or FLAC) instead.
What is the difference between M4A and MP3?
M4A is a container that usually holds AAC audio (lossy) but can also hold ALAC audio (lossless). AAC generally sounds better than MP3 at the same bitrate. MP3 has wider device compatibility. If your M4A contains ALAC, converting to MP3 is lossless-to-lossy. If it contains AAC, it's lossy-to-lossy.
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