Audio Converter Online

Convert audio files directly in your browser. No upload to server, no registration, 100% free.

🔒 Your files never leave your device
📁
Drop audio file here or click to browse
WAV, MP3, FLAC, OGG, AAC, M4A, WebM — up to 200 MB
🎵
WAV →
Decoding audio...
✅
Conversion complete!

How It Works

1
Choose File
Drop or select any audio file from your device
2
Pick Format
Select the output format: WAV or MP3
3
Download
Your file is converted instantly in the browser

Supported Formats

Input Format→ WAV→ MP3→ FLAC ⚡
WAV (.wav)✓✓✓ WASM
MP3 (.mp3)✓✓✓ WASM
FLAC (.flac)✓✓✓ WASM
OGG (.ogg)✓✓✓ WASM
AAC (.aac, .m4a)✓✓✓ WASM
WebM (.webm)✓✓✓ WASM

All decoding uses your browser's built-in Web Audio API. MP3 encoding uses lamejs. Based on open source go-audio-converter.

Frequently Asked Questions

Is my audio file uploaded to a server?
No. All audio conversion happens directly in your browser using Web Audio API and JavaScript. Your files never leave your device. There is no server-side processing — check the network tab in DevTools to verify.
What is the maximum file size?
Since processing happens in your browser, the limit depends on your device's available memory. Most modern devices handle files up to 100–200 MB without issues. For very large files, consider using our CLI tool: go-audio-converter — a pure Go converter with no file size limits.
What audio quality can I expect?
WAV output is lossless — identical to the decoded audio. MP3 encoding at 192 kbps provides high quality suitable for most purposes. You can select up to 320 kbps for maximum quality.
Does it work offline?
The converter works offline after the page is loaded (MP3 encoding library needs to load once). Bookmark this page for quick access.
Can I use a command-line tool instead?
Yes! Our open source go-audio-converter is a pure Go audio converter — no FFmpeg, no CGO, single binary. It supports WAV, MP3, FLAC conversion and runs on any platform including as WebAssembly.