Audio converter

How it works

1. 1

   Add your file

   Drop an audio file, or a video, to pull its soundtrack. It stays on your device.

2. 2

   Pick the format

   MP3 for compatibility, M4A for quality per byte, WAV or FLAC for lossless, OGG for the smallest files.

3. 3

   Download

   The converted audio, no watermark, no signup.

Every lossy conversion costs a generation

Converting MP3 to AAC, or AAC to MP3, is not a translation. The file is decoded back to raw audio and then compressed again by a different codec with different ideas about what can be discarded. The first encoder already threw away everything it judged inaudible; the second one now treats what survived as the original and throws away more.

The practical rule that follows is simple: always convert from the best source you have, never from a conversion. If you have the original WAV or FLAC, convert from that, even if you also have an MP3 sitting right there. Chaining lossy formats is how audio slowly turns thin and swirly, and no setting on any converter can undo a generation that has already been lost.

Going from lossless to lossy is a single, honest generation and is what these codecs were built for. Going from lossy to lossless is the one that fools people: converting an MP3 to WAV produces a very large file that sounds exactly like the MP3, because the detail was gone before the conversion started.

Convert audio formats locally, with no upload and no cap

MP3, M4A, WAV, and the rest are handled on your own device. There is no upload, no size ceiling, and no watermark or audio tag added to the output.

That means a folder of long recordings converts at whatever speed your machine manages rather than whatever a free tier allows, and nothing you convert is ever copied to a server you do not control.

If the audio is currently inside a video, the audio extractor will lift the track out first, ideally without re-encoding it at all. If it is simply too quiet, the volume booster is the tool, not a format change.

Why nothing uploads

Other tools send your video to their servers, which costs them money per file, so they add watermarks, cap file sizes, and make you sign up. This tool does the work right here in your browser using your own device. Your file is never uploaded, so there is no wait, no watermark, no size limit, and no account.

Questions

Which format should I pick?

MP3 plays on everything and is the safe default. M4A sounds better at the same size. WAV and FLAC are lossless (FLAC is about half the size of WAV). OGG/Opus gives the smallest files for speech and podcasts.

Can I convert a video's audio?

Yes, drop any video and you get just its soundtrack in the format you chose.

Does converting lose quality?

Between lossy formats (MP3 → M4A) some generational loss is inherent, though rarely audible at these bitrates. Converting to WAV or FLAC never loses anything.

Is there a file size limit?

No artificial cap, your device's memory is the only limit.

Does my file get uploaded?

No. Conversion runs in your browser; the file never leaves your device.

More tools