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.