Video 圧縮or

Large video files cause problems—they're impossible to email, won't fit on mobile デバイスs, slow down website loading, and consume excessive storage. Video 圧縮ion reduces file size dramatically while maintaining acceptable visual quality, essential for sharing, distribution, and storage.

Bitrate control

圧縮ion works by reducing bitrate—the amount of data per second. Video bitrate ranges from 500-1500 kbps for most uses, with lower bitrates creating smaller files at the cost of visible quality loss. Audio bitrate typically ranges from 64-192 kbps, with lower values suitable for voice content and higher values needed for music. The tool shows file size estimates as you adjust, so you see exactly what size reduction you'll achieve.

Quality and size trade-offs

At 800 kbps video bitrate, a 100 MB video might 圧縮 to 20 MB, cutting storage and sharing friction by 80%. Lower bitrates (400 kbps) 作成 even smaller files perfect for mobile viewing and social media, while higher bitrates (2000 kbps) maintain nearly original quality for archival. Finding your sweet spot depends on content type—talking heads tolerate lower bitrates better than sports or action.

Common workflows

Content creators 圧縮 videos for YouTube アップロードs to stay within platform limits and improve playback speed, social media managers reduce videos for Facebook or Instagram sharing, businesses 圧縮 conference recordings for distribution, students reduce video projects to email to instructors, and travelers 圧縮 videos to fit on phones with limited storage.

Real-time re-encoding

The tool re-encodes your video at your chosen bitrate using the MediaRecorder API. A 5-minute video takes roughly 5 minutes to 圧縮 (real-time processing), showing progress as it works. Once complete, ダウンロード your 圧縮ed WebM file ready for use.

WebM フォーマット 利点

WebM uses modern VP8/VP9 codecs with superior 圧縮ion compared to older フォーマットs. The result works in all modern ブラウザs and is increasingly standard across web platforms and streaming services.

ブラウザ-based processing

圧縮ion happens entirely in your ブラウザ—no server アップロードs, no privacy concerns, complete control over settings. Your original file stays on your computer and isn't transmitted anywhere.

Optimal for specific purposes

Experiment with different bitrate settings to find the balance right for your purpose—archive quality at higher bitrates, or extreme 圧縮ion for mobile-first distribution.