Audio Converter
Convert between MP3, WAV, FLAC, M4A and OGG. Files are processed in your browser and never leave your device.
Drop your audio file here
or click to choose · MP3 WAV FLAC M4A OGG AAC, video (MP4) works too
Choose fileHow to use
- Drop or choose the audio file to convert. Upload a video and only the sound is extracted.
- Pick the output format (MP3, WAV, FLAC, M4A, OGG) and quality.
- Hit 'Convert' — the file is converted inside your browser and downloads right away.
Frequently asked questions
Are my files uploaded to a server?+
No. Conversion happens entirely inside your browser and your file is never sent anywhere. Sensitive recordings are safe.
Which formats are supported?+
MP3, WAV, FLAC, M4A (AAC) and OGG, in any direction. You can also upload a video file such as MP4 and extract just the audio track.
Will conversion hurt the audio quality?+
Converting to lossless formats (WAV, FLAC) loses nothing. Converting to lossy formats (MP3, M4A, OGG) keeps the quality of the bitrate you choose — at 192kbps and above, most people can't hear a difference.
Is there a file size limit?+
No server limits. Processing uses your device's memory, so files up to hundreds of MB work on a desktop. Typical music files (3–15MB) are no problem at all.
Why does it say 'preparing engine' at first?+
The conversion engine (a WebAssembly build of FFmpeg, ~30MB) is downloaded once. After that it's cached by your browser and starts instantly.
Can I extract audio from a video?+
Yes. Upload an MP4 or similar video, choose an audio format like MP3, and only the sound is extracted — handy for listening to lectures on the go.
Does it work on my phone?+
Yes, in modern mobile browsers like Chrome and Safari. For very large files (hundreds of MB), a desktop with more memory is recommended.
Is it really free?+
Yes. No sign-up, no payment, no conversion limits and no watermark. The site is supported by ads.
Guide
Which format should I choose?
MP3 is the universal standard that plays on virtually every device and app — choose it when compatibility matters most. M4A (AAC) sounds slightly better than MP3 at the same size and is the native choice in the Apple ecosystem, while OGG is an open format common in games and the web.
WAV is uncompressed audio — big files, but ideal as an intermediate for editing and mixing. FLAC compresses to about half the size with zero quality loss, making it the right choice for archiving music. In short: MP3/M4A for everyday listening, WAV for editing, FLAC for your collection.
What is bitrate?
Bitrate (kbps) is how much data is used to represent each second of sound — higher means better quality and bigger files. For MP3, 128kbps is streaming quality, 192kbps is plenty for everyday listening, and 320kbps is the best MP3 can offer.
One caveat: converting a 128kbps file up to 320kbps does not improve its quality. Information discarded by lossy compression is gone for good. Converting down to a lower bitrate shrinks the file, trading away some quality.
How does this tool work?
It runs FFmpeg — the de-facto standard open-source engine for audio and video processing — compiled to WebAssembly, directly inside your browser. Typical online converters upload your file to their servers; this tool brings the engine to your device instead.
Because your file never leaves your device, sensitive audio like meeting recordings, phone calls or unreleased tracks stays private — and with no upload or download queues, audio conversion usually finishes in seconds.