Video Compression Tools
Compress AVI, MKV, and other video container formats entirely in your browser. No uploads, no server processing - all compression happens locally on your device.
Compress
3 tools
AVI Compressor
Compress legacy AVI video files using H.264 or VP9 re-encoding - shows dramatic size reduction from uncompressed AVI. Free online AVI compressor, no signup required.
MKV Compressor
Compress MKV container videos in your browser - strip subtitle and audio tracks, select resolution (240p-1080p) and bitrate (250 kbps-8 Mbps), output as WebM or MP4. Free online MKV compressor, no signup required.
Video Codec Comparison Tool
Compare H.264, H.265, VP9, and AV1 output sizes side by side for any video - H.264 and VP9 encoded natively, H.265 and AV1 estimated. Shows quality scores and downloadable outputs. Free online video codec comparison tool.