Typically 50-90% reduction depending on settings. Social Media preset reduces 70-80% with good quality. Email preset reduces 60-70%. Web preset reduces 50-60%. Maximum compression can reach 90% for large HD files.

Choose your balance: 'High Quality' (minimal loss, ~40% smaller), 'Balanced' (good quality, ~60% smaller), or 'Maximum Compression' (acceptable quality, ~80% smaller). All modes maintain watchable quality.

MP4 with H.264 codec offers best compatibility and compression. For newer devices, H.265 (HEVC) provides 50% better compression but may not play on older devices. WebM is great for web embedding.

Yes! Use the Email preset which targets 25MB (Gmail limit) or 20MB (Outlook limit). Automatically adjusts resolution and bitrate to fit under email attachment limits while maintaining watchable quality.

Videos up to 2GB or 4 hours can be compressed. That's approximately a full 1080p movie. For longer videos, compression may take 10-20 minutes. Progress bar shows estimated completion time.