How Video Compressor Works
Reduce video file size with High, Medium, Low, and Very Low quality presets using browser-native VP9 encoding — no upload needed.
Try it free →Step-by-step process
- 1
Quality preset selection
Choose from High (4 Mbps), Medium (1.5 Mbps), Low (600 Kbps), or Very Low (200 Kbps) target bitrate. Higher settings preserve more detail; lower settings reduce file size more aggressively.
- 2
VP9 re-encode
Your video plays to a canvas captured by a MediaRecorder set to the VP9 codec at the target bitrate. The video plays in real time as it encodes — processing time equals the video duration.
- 3
Download compressed file
The compressed WebM file is offered for download when encoding completes. File size depends on content complexity — static backgrounds compress more than fast motion.
Frequently asked questions
Is VP9 compatible with Instagram, YouTube, and TikTok?
Most platforms accept WebM VP9 on upload and re-encode internally. For guaranteed compatibility, convert the output to MP4 using the Video Format Converter after compressing.
What file size reduction should I expect?
Talking-head footage at Low preset typically achieves 60–80% size reduction. High-motion sports footage compresses less. Results vary by content type.
Will compressing multiple times further reduce the size?
Yes, but with diminishing returns and increasing quality loss. Each re-encode generation degrades the video slightly. Compress once at your target quality rather than compressing iteratively.