Fast Screen Capture

Recordings are written to your browser’s private storage on this computer, as they happen. There is no upload, no cloud copy, no account, and no server that could receive a recording. fastscreencapture.com serves the app itself and nothing else.

The one time a recording leaves the browser is when you choose to: Export renders a file to a location you pick, and Download hands you the original. Both go to your own computer.

• A recording exists only in the browser that made it. Another browser, another machine, or a private window starts empty. Nothing syncs.
• Clearing this site’s data in your browser deletes your recordings. Installing Fast as an app asks the browser to protect them from automatic cleanup; the library shows whether that protection is on.
• Editing never changes the original. Trims and cuts are saved as instructions beside it; Export writes a new file.
• No analytics, no tracking, no cookies beyond what the browser needs to run the page.

Capture is written to disk every second, so a crash or a closed tab costs at most about a second. An interrupted recording is offered for recovery the next time the library opens. Stopping gives you a moment to save, resume, or discard before anything is final.

Chrome and Edge give the full experience: tab and system audio, on-device storage, and hardware video encoding for export. Firefox and Safari can record with limits; the record page’s browser check says exactly what’s missing.

The browser’s own capture, storage, and video APIs do the work: screen capture and MediaRecorder for recording, the origin private file system and IndexedDB for storage, and WebCodecs with the open-source mediabunny library for frame-accurate export. The app is served from Vercel as static files.