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Compress and convert video locally where supported — practical browser workflows for smaller files.
Local ffmpeg.wasm tools keep clips on your device. Large files need enough browser memory — try shorter clips if the tab struggles.
Common web formats such as MP4 and WebM are typical targets. Check each tool for exact codec options before exporting.
No — processing runs locally in your browser whenever possible. Your files and inputs do not leave your device unless a tool explicitly uses the network.