Video File Compressor

Reduce huge video file sizes drastically for email, Discord, or WhatsApp using local H.264 CRF encoding offline.

Upload Video to Compress

Instantly shrink massive MOV or MP4 files directly using your device's RAM logic without waiting in cloud queues.

Compression Matrix

Lossless (18)Web Standard (28)Poor Quality (51)

We utilize WebAssembly (WASM) to compile FFmpeg directly inside your web browser. This means your private home videos are never uploaded to a third-party server network.

Client-Side H.264 Video Compression

Most modern smartphones record videos in massive 4K formats that can easily exceed several gigabytes for just a few minutes of footage. Attempting to share these over Discord (25MB limit), Email attachments (25MB limit), or Slack is often completely impossible without heavy compression.

What is Constant Rate Factor (CRF)?

Instead of manually guessing a bitrate metric, modern libx264 encoders utilize the CRF system to dynamically apply compression only where visually necessary. The default scale runs from 0 (lossless) to 51 (worst). A CRF value of 28 is universally considered the perfect balance for halving the file size without noticeable visual quality dropping on modern device screens.

About Video File Compressor

This is a free, fast, and fully client-side video file compressor tool. All processing is done locally within your browser to ensure maximum privacy and security. No data is sent to our servers. Bookmark this page for quick access to ad-free, high-performance SEO and developer utilities.