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Elixuvo

Video Compressor

Compress MP4, MOV, and WebM videos in your browser using FFmpeg WebAssembly. Fast, private, with zero server uploads.

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How to use this tool

  1. Drop or select an MP4, MOV, or WebM video file (up to 500 MB).

  2. Preview the video and review the original file size.

  3. Choose a compression preset: Light (CRF 23), Balanced (CRF 28), or Maximum (CRF 32).

  4. Optionally choose to downscale resolution to 720p HD or 480p SD for maximum savings.

  5. Click Compress Video to transcode via in-browser WebAssembly.

  6. Preview the compressed video and click Download to save your optimized file.

Frequently asked questions

Quick answers about file privacy, processing modes, formats, and device support.

No. All video compression runs entirely inside your web browser using WebAssembly and client-side FFmpeg. Your media files never touch any external server.
CRF (Constant Rate Factor) controls the balance between video quality and file size in H.264 video encoding. A lower value (e.g. 23) preserves finer details but yields a larger file, while a higher value (e.g. 32) achieves significant size reduction.
You can compress MP4, MOV, and WebM videos. The compressed video is exported as a standard web-compatible MP4 file with H.264 video and AAC audio.
Video compression requires intensive CPU computation. Because encoding happens client-side using WebAssembly, performance depends on your computer's processor speed and the length of your video clip.

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