Audio converter
Drop any common audio file and convert it to MP3, WAV, M4A, AAC, FLAC, OGG Vorbis, Opus, or AIFF — with control over bitrate, sample rate, channels, volume, trim, and fades. Every conversion runs entirely in your browser, so the audio never leaves your device.
One converter, every common format
Pick an output format and the converter decodes your file and re-encodes it on the spot. MP3, AAC/M4A, OGG Vorbis, and Opus are lossy — they compress hard by discarding detail you are unlikely to hear, with Opus packing the most quality into the smallest file. WAV, FLAC, and AIFF are lossless: FLAC compresses without throwing anything away, while WAV and AIFF store the raw, uncompressed samples. You can set a bitrate (with optional VBR), change the sample rate or channel layout, adjust volume, reverse the track, trim a start and end, and add fades.
Lossless does not undo lossy
A common misconception is that converting to FLAC or WAV restores quality. It cannot. Converting an MP3 to FLAC won't recover the detail the MP3 already discarded — you simply end up with a much larger file that contains the same already-compressed audio. Lossless output is genuinely worth it only when your source is itself lossless (for example a WAV or FLAC original). For everyday sharing, a good lossy format at a sensible bitrate is usually the better trade-off.
Is it private?
Yes. The converter is a WebAssembly audio engine running on your own machine. Nothing is uploaded, stored, or seen by us — there is no server to send files to, and the conversion still works offline once the page has loaded.
Frequently asked questions
- Which audio formats can I convert to?
- MP3, WAV, M4A (AAC in an MP4 container), AAC (a raw ADTS stream), FLAC, OGG Vorbis, Opus, and AIFF. Input can be any of these plus most other common audio files — the converter reads the file and re-encodes it to the format you pick.
- Will converting to FLAC or WAV improve the quality of an MP3?
- No. Lossless formats like FLAC, WAV, and AIFF can only preserve what is already in the source. Converting a compressed MP3 to FLAC won't recover the detail the MP3 already discarded — you just get a larger file holding the same audio. Lossless conversion is only a true quality gain when the source is itself lossless.
- What's the difference between MP3, AAC/M4A, OGG, and Opus?
- They are all lossy formats that throw away inaudible detail to save space. MP3 is the most universally supported. AAC/M4A is the Apple-ecosystem default and generally sounds better than MP3 at the same bitrate. OGG Vorbis is a royalty-free option. Opus is the most efficient — it keeps the most quality per kilobyte — and is ideal for speech and low bitrates.
- Can I change the bitrate, sample rate, or trim the clip?
- Yes. You can set the bitrate (with optional variable bitrate), sample rate, and channels, adjust the volume, reverse the audio, trim a start and end point, and add fade-in / fade-out. Bitrate settings only apply to the lossy formats — they are ignored for WAV, FLAC, and AIFF.
- Are my files uploaded to a server?
- No. The conversion runs on your device using a WebAssembly audio engine. Your audio is never sent anywhere, and the tool keeps working even if you go offline after the page loads.
- Is it free, and do I need an account?
- It is free with no watermarks, no daily caps, and no sign-up. Drop a file, pick a format, and download.