How ClipTools works
The short version: your browser does the work, not a server. Here is what that means and why it is better.
Processing happens on your device
Traditional online converters upload your file to a remote server, process it there, and send the result back. ClipTools flips that model. When you choose a file, it is loaded into your browser’s memory and processed locally — the bytes never travel across the internet. That is why ClipTools is private by design: there is no server copy of your video to leak, log, or store.
Powered by FFmpeg and WebAssembly
Under the hood, most ClipTools tools run FFmpeg, the open-source media framework trusted by professional editors, streaming platforms, and broadcasters worldwide. We compile FFmpeg to WebAssembly so it runs inside your browser at close to native speed.
The three steps
- Choose a file. Drag and drop or browse. It stays on your device.
- Pick your settings. Quality, format, trim points, resolution — whatever the tool offers. FFmpeg runs locally to apply them.
- Download the result. The finished file is generated in your browser and saved straight to your device.
The one exception: transcription
The video-to-text and auto-captions tools use an AI speech-to-text service, which runs on a server. Even then, we extract only the compressed audio in your browser first and send just that audio — never your video — to be transcribed. The audio is processed for transcription and not retained.
Frequently asked questions
Does ClipTools upload my video to a server?
No. For nearly every tool, your video is processed entirely in your browser using WebAssembly. The file is read into memory on your own device, processed there, and handed back to you — it is never uploaded, stored, or transmitted.
What is WebAssembly and why does it matter?
WebAssembly (Wasm) is a technology that lets high-performance compiled code run inside the browser at near-native speed. ClipTools uses it to run FFmpeg directly on your device, with no server required.
Why is the first conversion a little slower?
The first time you use a tool, the browser downloads the FFmpeg engine (a few megabytes) and caches it. After that, the engine loads instantly and conversions start right away.