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Typically 50-80% smaller. A 200MB video on "medium" quality often drops to 40-80MB. Videos with high bitrates see the biggest savings.

No. By default, FFmpeg runs via WebAssembly in your browser. On some lower-powered devices, processing may use our secure server for better performance.

You're probably on "low" quality. Switch to "medium" or "high" for better visual clarity. Low is designed for maximum compression at the cost of detail.

Input: MP4, WebM, MOV, AVI. Output is always MP4 (H.264) for maximum compatibility with all devices and platforms.

Depends on video length and your device. A 1-minute video takes roughly 30-60 seconds on a modern laptop. Longer videos proportionally longer.

Yes. Use "low" or "medium" quality to get under 16MB (WhatsApp) or 25MB (Gmail). Check the output size before sending.

Up to 500MB per video. No daily limits, no account needed, no watermarks.

Medium for most uses — good balance of size and quality. High for archiving or sharing where quality matters. Low when you just need the smallest possible file.

Yes, but video compression is CPU-intensive. It works best on recent phones (iPhone 12+, recent Android flagships). Older phones may be slow.

Yes. Audio is re-encoded alongside video. The output MP4 contains both video and audio tracks.