Guides
How private browser-based media tools really work — and how to check for yourself.
- Do online media converters upload your files? Most online media converters do upload your file to a remote server to process it, where it can be logged, retained, or exposed in a breach — but browser-local tools like ours do the work on your device and never send the file anywhere, which you can verify yourself in the DevTools Network tab.
- Browser-local vs cloud media tools: which is safer? For most everyday media tasks, browser-local tools are safer and faster than cloud tools because your files are processed on your own device and never uploaded, while cloud tools only pull ahead for very heavy jobs or cross-device workflows.
- How in-browser media processing actually works In-browser media processing uses standard browser technologies - WebAssembly, WebCodecs, the Canvas and Web Audio APIs, MediaRecorder, and Web Workers - to read, transform, and export your video, audio, images, and PDFs entirely on your own device, so the files themselves are never uploaded to a server.