WASM Media Tool
Extract audio, compress video, and convert formats 100% locally in your browser.
Loading FFmpeg WASM Core (Multi-Thread)... Please wait.
Audio Settings & Trimming
Click to upload or drag and drop
MP4, MOV, WEBM (Client-side process)
Why Use WASM Media Tool?
Most online converters require you to upload your personal videos or audio files to a third-party cloud server. WASM Media Tool operates entirely on your device using WebAssembly technology. Your files never leave your browser, ensuring absolute privacy and zero upload waiting times.
🔒 Is my data safe?
Yes, 100% safe. All processing happens locally inside your browser memory sandbox. We do not store, track, or look at your media files.
⚡ How does it work?
We run a compiled version of FFmpeg directly inside a web worker using WebAssembly and multi-threading, bringing native desktop-grade media conversion straight to your browser.