Audio Converter
Convert between MP3, WAV, OGG, FLAC, M4A and AAC — on your device, no upload.
- First use downloads the ~31MB audio engine once; it is cached after that.
- Practical input limit is about 500MB due to browser memory.
This audio converter changes a file between MP3, WAV, OGG, FLAC, M4A and AAC entirely on your device. Nothing is uploaded to a server — the conversion engine runs in your browser, so a private voice memo or an unreleased track never leaves your computer.
How to use this tool
- Drop an audio (or video) file into the tool.
- Pick the output format and quality.
- Click Convert and download the result.
Most online converters upload your file, convert it on their server, and give you a download link. That is slow for big files and a real privacy problem for personal recordings, interviews and demos. This tool flips the model: the same battle-tested FFmpeg engine that powers professional software is compiled to WebAssembly and runs inside your browser tab. Your file is read locally, converted locally, and saved locally.
Which format should you pick? Choose MP3 for maximum compatibility (every phone, car and player supports it). Choose WAV when an editor or DAW asks for uncompressed audio. Choose FLAC to shrink files without losing any quality. Choose M4A/AAC for Apple devices, and OGG for games and open-source projects.
Because everything runs on your own hardware, there are no queues, no daily limits and no watermarks. Files up to about 500MB work well; the first conversion downloads the engine once (~31MB) and it is cached after that.
Frequently asked questions
Is my audio file uploaded to a server?
No. The conversion runs entirely in your browser using WebAssembly. You can disconnect from the internet after the page loads and it still works.
What is the best bitrate for MP3?
192 kbps is a good balance of size and quality for most music. Use 320 kbps for archiving and 128 kbps for voice recordings or podcasts.
Can I convert a video's audio with this tool?
Yes — drop in a video file and the audio track is extracted and converted. There is also a dedicated Extract Audio tool with more options.
Does converting MP3 to WAV improve quality?
No. Converting a lossy MP3 to WAV makes a bigger file but cannot restore quality that was already removed. Use WAV output only when software requires it.
Is there a file size or daily limit?
No daily limits. The practical ceiling is about 500MB per file, set by browser memory rather than by us.
Why does the first conversion take longer?
The ~31MB conversion engine downloads once on first use. Your browser caches it, so later conversions start instantly.