Files never leave your device
Conversion runs entirely in your browser. Nothing is uploaded to any server.
Browser-based WebAssembly
FFmpeg compiled to WASM — the same engine professional tools use, running locally.
Instant, no queue
Conversion starts the moment you select a file. No upload wait, no processing queue.
All 39 Audio Converters
Every major format — grouped by conversion type.
MP3 Conversions
The universal format
Lossless
WAV, FLAC, AIFF
Video to Audio
Extract audio from video files
More Formats
OGG, Opus, AAC, WMA, M4A
What is an Online Audio Converter?
An audio converter changes an audio file from one format to another — for example, converting an MP3 to WAV for editing in a DAW, or a WAV to MP3 for sharing via email or podcasting. Different formats make trade-offs between file size, quality, and compatibility.
Traditional online converters work by uploading your file to a remote server, processing it there, and returning the result. AudioUtils takes a different approach: all conversion happens locally in your browser using FFmpeg compiled to WebAssembly. Your file never leaves your machine.
This matters most for sensitive audio: voice memos, unreleased music, podcast drafts, interviews, and recordings you don't want passing through third-party servers.
Frequently Asked Questions
Is this audio converter really free?
Yes. All conversions are free — no account required. The free tier outputs a 30-second preview. Pro ($9/month) unlocks full-length conversions and files up to 500 MB.
Do my audio files get uploaded to a server?
No. AudioUtils runs FFmpeg compiled to WebAssembly entirely in your browser. Your files never leave your device — we never see them, store them, or log them.
Which audio formats are supported?
MP3, WAV, FLAC, OGG Vorbis, M4A, AAC, WMA, AIFF, Opus, and video-to-audio extraction from MP4 and MOV — 39 total conversion pairs.
Does it work on iPhone, Android, Mac, and Windows?
Yes. Any modern browser works — Safari on iPhone (iOS 15.4+), Chrome on Android, and any desktop browser on Mac, Windows, or Linux.
How is this different from other online audio converters?
Most online converters upload your file to a remote server. AudioUtils processes everything locally in your browser using WebAssembly — no upload, no queue, no server-side storage risk.