Audio Converter
Convert audio to MP3, M4A, WAV, OGG, Opus, FLAC or AIFF, or take the sound from a video.
Free · No upload · 100% on your device
Audio Converter
Choose video or audio files, or drop them here.
MP4, MOV, MKV, WebM, AVI and more · No size or length limit. Nothing is uploaded.
100% on your device
How to use Audio Converter
- Choose your audio files, or drop them on the page.
- Pick the settings in the side panel.
- Select “Convert audio”. The first use downloads the video engine once.
- Download the result. Your original file is left unchanged.
Private by design. Your files are processed in this browser tab and are never uploaded to KittySuite.
About Audio Converter
MP3 and M4A play almost everywhere, WAV and AIFF are uncompressed for editing, FLAC is lossless but smaller, and Opus is efficient for voice. Converting from a lossy format (MP3, M4A) to a lossless one does not bring back lost quality. You can convert many files at once.
Processing happens in this tab with FFmpeg compiled to WebAssembly; your recordings are never uploaded. The first video or audio tool you use downloads the 10 MB engine once and keeps it cached for next time. On phones, files are processed one at a time to stay within memory, and long recordings take a little longer. Keep the tab open until the download appears.
Audio Converter: frequently asked questions
How do I convert audio to MP3?
Choose one or more audio files, pick MP3 and a quality, then convert. You can also choose M4A, WAV, OGG, Opus, FLAC or AIFF.
Which format should I choose?
MP3 and M4A play almost everywhere, WAV and AIFF are uncompressed for editing, FLAC is lossless but smaller, and Opus is efficient for voice.
Does converting MP3 to WAV or FLAC improve quality?
No. Quality lost in a lossy file cannot be brought back; the file just becomes larger.
Can I take the sound from a video?
Yes. Video files are accepted too and their soundtrack is converted.
Are my recordings uploaded?
No. FFmpeg runs inside your browser. The first video or audio tool you use downloads the roughly 10 MB engine from this site once; your files are never uploaded.