Audio Converter
Convert an audio file to MP3 or WAV, right in your browser.
About this tool
Converts an audio file to MP3 or WAV, entirely in your browser — your browser's own audio engine decodes the source file, then a small open-source encoder (lamejs, for MP3) or a plain WAV writer builds the output. Nothing is uploaded anywhere.
Works with whatever formats your browser can already play — MP3, WAV, OGG, FLAC, M4A/AAC, and more, depending on your browser.
Frequently asked questions
- Why isn't my file loading?
- This tool relies on your browser's own audio decoder — if your browser can't play the file (an uncommon codec, or a DRM-protected file), it can't be converted here either.
- Does this work on video files?
- No — choose an audio file. Pulling audio out of a video is a different operation this tool doesn't do.
- What's the difference between MP3 and WAV here?
- WAV is uncompressed — larger files, no quality loss, and instant to produce. MP3 is compressed and much smaller, with a small, generally inaudible quality trade-off; 320 kbps is close to transparent for most listeners.
- Why is the output's sample rate different from my original file?
- Your browser's audio engine decodes the file at its own internal sample rate (commonly 44.1kHz or 48kHz) rather than always preserving the source file's exact rate — this is a browser behavior, not something this tool controls. The audio content and duration are unaffected; only the sample rate may differ.
- Is my audio uploaded anywhere?
- No — decoding and encoding both happen entirely on your device. Nothing is sent to any server.