Free

Free Audio to MP3 Converter Online

A free online audio to MP3 converter: turn WAV, FLAC, M4A, and OGG into MP3 — in your browser.

Free tool · No sign-up · Private

Quality

Drop in an audio file

WAV, FLAC, M4A, OGG — up to ~50MB. Converted entirely in your browser with the LAME encoder — your file never leaves this device. Note: M4A decodes in Chrome/Edge; Firefox can't decode it.

Private by design. Decoding and encoding run 100% in your browser. Your audio is never uploaded, stored, or seen by anyone.

Formats & limits

What you can convert

Straightforward limits, stated plainly.

WAV, FLAC, M4A, OGG in

Anything your browser can decode. Note: Firefox can't decode M4A/AAC — use Chrome or Edge for those.

LAME MP3 out

The reference MP3 encoder, at 96, 128, 192, or 320 kbps. Mono and stereo both handled correctly.

~50 MB file cap

Everything happens in browser memory. Long high-res files convert best in a desktop browser.

Private by design

The ~150 KB encoder loads once per visit. No accounts, no uploads, no watermarks.

How it works

Three steps to your MP3

Drop in an audio file

Choose a WAV, FLAC, M4A, or OGG file up to ~50MB. It stays on your device — nothing is uploaded.

Pick a quality

96 kbps for smallest files, 192 for everyday music, 320 for best quality. Press “Convert to MP3”.

Preview and download

Listen to the MP3 right on the page, then download it — plays on every device ever made.

Use cases

When conversion helps

MP3: the format everything speaks.

Huge WAVs → small MP3s

A 3-minute WAV is ~30 MB; as a 192 kbps MP3 it's ~4 MB. Same listening experience, one-seventh the size.

FLAC for the car

Car stereos and older players often choke on FLAC. MP3 plays on literally everything with wheels or speakers.

Voice memos to share

M4A voice memos don't open everywhere. Convert to MP3 and anyone can play the recording.

Podcast-ready files

Podcast hosts and directories expect MP3. Convert your edited WAV/FLAC master to a 128–192 kbps MP3 for upload.

FAQ

Audio converter questions

Which audio formats can I convert to MP3?

WAV, FLAC, M4A/AAC, OGG, and Opus — anything your browser can decode. The file is decoded with your browser's own audio engine, then re-encoded to MP3 with LAME, the gold-standard MP3 encoder.

What bitrate should I choose?

96 kbps for the smallest files (fine for speech), 192 kbps as the everyday sweet spot for music, 320 kbps for the best quality MP3 can offer. Converting a low-quality source to 320 kbps won't improve it — match the bitrate to your source.

My M4A file won't convert in Firefox. Why?

Honest browser quirk: Firefox can't decode M4A/AAC audio in its Web Audio engine, so there's nothing to convert. Open the tool in Chrome or Edge instead — they decode M4A fine. WAV, FLAC, and OGG work in all browsers.

Will converting FLAC to MP3 lose quality?

MP3 is a lossy format, so technically yes — but at 192–320 kbps the difference from the original is inaudible to nearly everyone. If you need bit-perfect archiving, keep the FLAC; for listening and sharing, MP3 is the practical choice.

Is there a file size limit?

Yes — files up to ~50 MB. Decoding and encoding happen in your browser's memory, so very long high-resolution files are best converted in a desktop browser.

Is my audio uploaded anywhere?

No. The LAME encoder (~150 KB) loads once into your tab, and your file is decoded and encoded locally. Nothing ever leaves your device.

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