Video Compressor
Compress Video Online Free. Reduce video file size while maintaining quality. No upload required. Supports MP4, WebM, AVI, MOV, MKV formats.
Drag & Drop Video File
or click to browse
Supported: MP4, WebM, AVI, MOV, MKV, FLV
How the Video Compress Tool Works
Optimize your videos for web, social media, and sharing by reducing file size without losing more quality than necessary.
1. Upload your video
Drag and drop a video file (MP4, WebM, AVI, MOV, MKV, FLV) into the upload area or click to browse. The tool displays duration, format, and original size.
2. Choose compression settings
Select a compression level, optional resolution downscale, output format, and audio quality. The estimated size reduction helps you understand the expected savings.
3. Compress and download
Start the compression process and wait while the in-browser media engine re-encodes your video. When its done, preview the result and download the optimized file.
Key Features & Benefits
Reduce huge video files to a more manageable size while staying in control of quality, resolution, and format.
Local, browser-based processing
Compression is handled by a WebAssembly-powered media engine running in your browser. Your videos are not permanently stored on any remote server.
Flexible compression levels
Choose from preset CRF values (low to extreme) to balance visual quality against file size, from light optimization to aggressive compression.
Control over resolution
Downscale full HD videos to 720p, 480p, or 360p to dramatically shrink file size while still keeping them watchable on small screens.
Multiple output formats
Export as MP4 (H.264) for maximum compatibility, WebM (VP9) for better compression, or MKV for flexible container support.
Adjustable audio quality
Lower the audio bitrate to gain additional savings, or keep it higher when sound quality is more important for your content.
Free to use, no watermark
Compress as many videos as you like without sign-ups or watermarks being added to your footage.
Frequently Asked Questions
Common questions about reducing video file size directly in your browser.
The compression process runs locally in your browser using WebAssembly. Videos are temporarily loaded into memory for processing but are not permanently stored on our servers.
It depends on your original resolution, bitrate, and chosen settings. In many cases you can reduce file size by 50–80% while keeping the video acceptable for online viewing.
Some quality loss is expected when you compress aggressively or lower the resolution/bitrate. Using the medium or high presets usually keeps a good balance between size and visual quality.
Video encoding is CPU-intensive. Processing time depends on video length, resolution, chosen settings, and your devices performance. Short clips finish faster than long HD recordings.
The tool may work on some modern mobile browsers, but large video processing can be slow or unstable on low-powered devices. For best results, use a desktop or laptop computer.
MP4 (H.264) is the safest choice for compatibility across browsers and devices. WebM offers better compression for platforms that support it, while MKV is useful as a flexible container for local playback.