Audio Converter
WAV, MP3, FLAC, AIFF, OGG, M4A — no upload, no account. Convert one file, or batch-convert multiple files into a single ZIP (Premium). Everything runs in your browser.
Compressing a loud master can push peaks above 0 dB. This lowers the level just enough for the converted file to peak at −1 dBTP or below.
Batch conversion
100% in your browser — no data is ever sent to a server.
How it works
- Drop your audio file. Any common audio file up to 500 MB — it's decoded locally, nothing is uploaded.
- Choose the output format. MP3, M4A (AAC), OGG, WAV, FLAC, ALAC or AIFF — and pick the quality for MP3 (128 to 320 kbps or V0) and AAC (192 to 320 kbps).
- Convert and download. Hit Convert, listen to the result in the built-in player, then download your converted file.
Features
- 100% in your browser, no upload. The conversion runs locally with ffmpeg.wasm — your file never leaves your computer.
- Seven output formats. MP3, M4A (AAC), OGG Vorbis, and lossless WAV, FLAC, ALAC and AIFF at your file's bit depth.
- Pro encoder settings. MP3 at 128 to 320 kbps or VBR V0 (default 320 kbps), AAC at 192, 256 or 320 kbps (default 256 kbps, the store standard).
- Tags and cover art kept. Title, artist, album, ISRC and the original cover image (not re-compressed) when the format can hold them.
- No clipping on playback. Optional 1 dB headroom: the converted file is measured and peaks at −1 dBTP or below.
- Instant preview. Listen to the converted file right on the page before downloading it.
FAQ
Is this audio converter free?
Yes. Without an account you get 2 free conversions per day across AudioKit's free tools; with a free account, 5 per day. If you need more, AudioKit Premium removes the daily limit. There's no watermark and no feature lock: the free conversion is the full conversion, including the 320 kbps MP3 setting.
Is my audio file uploaded to a server?
No. The conversion runs entirely in your browser using ffmpeg.wasm: your file is decoded and re-encoded on your own machine and never leaves it. The only network call is a tiny anonymous counter that tracks your daily free quota.
Which audio formats are supported?
You can convert to MP3 (128 to 320 kbps or VBR V0), M4A (AAC at 192, 256 or 320 kbps), OGG Vorbis, and lossless WAV, FLAC, ALAC or AIFF (your file's bit depth is kept). Title, artist, album and cover art are carried over when the format can hold them. On input, drop any common audio file — WAV, MP3, FLAC, AIFF, OGG, M4A — up to 500 MB. If your audio is stuck inside a video, use our extract audio tool first.
Does converting improve audio quality?
No — conversion can preserve quality, never add it. Converting a lossy MP3 to WAV or FLAC gives you a much bigger file with exactly the same sound: the detail discarded by the original MP3 encoder is gone for good. Lossless to lossless (WAV, FLAC, AIFF) is fully transparent, while every re-encode to a lossy format (MP3, OGG, M4A) loses a little more detail.
What bitrate should I choose for MP3?
If file size isn't a concern, keep the default 320 kbps: it's the highest quality the MP3 format allows and is virtually indistinguishable from the source for most listeners. 256 kbps still sounds excellent at a smaller size, 192 kbps is fine for casual listening, and 128 kbps is best reserved for voice recordings or when space is really tight.