Audio converter
Convert between MP3, M4A, WAV, Opus and FLAC.
How this works
- Nothing is uploaded — the file is decoded and re-encoded by your own browser, so there is no queue, no size limit beyond your device’s memory, and your recording never reaches anyone else.
- MP3 is the interesting one — no browser ships an MP3 encoder, only a decoder, which is why most free converters are servers. This loads a small encoder into the page on demand instead.
- Cutting is exact — set the start and end by ear with the player, then use the playhead button to snap a marker to where you are. What you keep is what you hear between them.
- Video files work too — drop an MP4 or a MOV and the audio track comes out on its own. The picture is discarded.
Five formats in, five formats out, and the conversion happens on your own device. Every page on the tool says which format suits what, because the honest answer is usually "the one the thing you are using accepts".
The interesting part is MP3. Browsers can *play* MP3 everywhere but none of them can *create* one — there is a decoder built in, and no encoder. That is the real reason nearly every free MP3 converter asks you to upload: the encoding is happening on their machine. This page loads a small MP3 encoder into the page instead, so the file stays put.
Quality is a choice rather than a fixed setting, and uncompressed WAV and lossless FLAC are both offered for when you are converting something you intend to edit.
How to use it
- Drop in the audio file.
- Choose the format you need.
- Pick a quality if the format has one.
- Convert and download.
Frequently asked questions
Which format should I pick?
MP3 if something old has to play it. M4A for better quality at the same size, and for Apple devices. WAV if you are going to edit it. FLAC to archive without losing anything. Opus is the best per byte but the least widely supported.
Does converting MP3 to WAV improve the quality?
No. It makes the file much larger and changes nothing about what is in it — the detail an MP3 discarded is gone. WAV is worth it when a program demands it or you are about to edit, not as an upgrade.
Why is my WAV file so much bigger?
Because WAV is uncompressed: about 10 MB a minute in stereo, against roughly 1 MB for a good MP3. That is the trade, not a fault.
Is anything uploaded?
No. Decoding and encoding both happen in your browser, including the MP3 encoding that usually requires a server.
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