Local Audio Convert – Privacy-first browser-based audio converter

Summary: Local Audio Convert processes audio files entirely in the browser using WebAssembly, ensuring files never leave the device. It supports formats like MP3, WAV, M4A, and OGG, providing fast, client-side conversion without uploads or installations.

What it does

It runs a full FFmpeg instance via FFmpeg.wasm in Chrome, Edge, and Firefox to convert audio files locally. The initial load downloads a ~25MB core file, with Cloudflare caching to speed up subsequent uses.

Who it's for

Users needing secure, private audio conversion without uploading files or installing software, such as those handling personal voice memos.

Why it matters

It eliminates privacy risks by keeping audio processing on the client side, avoiding cloud uploads and protecting sensitive files.