Frequently asked questions.

No. VideoDock has no upload endpoint. Your file is read locally with the File API and processed in your browser tab. You can confirm this in your browser's network panel — no upload requests appear.

We can't — they never reach us. We only store small, non-sensitive preferences (theme, defaults, favorites) in your browser's local storage, which you can clear anytime.

After the page loads, most tools keep working without a connection because all processing is local. GIF and MP3 export pull a small encoder library the first time.

Anything your browser can decode — usually MP4, WebM, MOV, MKV and M4V. Decoding support depends on your browser and OS.

The default engine uses MediaRecorder, which writes WebM. The optional FFmpeg engine (when your environment supports cross-origin isolation) produces true MP4.

Compression is lossy, so some quality is traded for size. The Compress tool shows a before/after comparison so you can judge before downloading.

There's no fixed limit, but very large files use more memory and may be slow or fail on low-memory devices. Trimming first helps.

The default engine captures frames in real time for frame-accurate output. The FFmpeg engine is faster where available.

Yes — the Batch tools queue multiple files, process them in order locally, and bundle the results into a ZIP.