Zoven

Video Compressor

Compress MP4 video online, reduce video file size with H.264

What is the Video Compressor?

The video compressor works like this: it shrinks videos by re-encoding with CRF quality targeting and optional resolution reduction. Everything happens on your device - the input never leaves your tab unless the tool clearly states it performs a server-side lookup.

How to use the Video Compressor

Select your audio or video file.
Set the conversion options (format, quality, range).
Process - the browser engine handles it locally.
Download the output.

Features

Powered by in-browser FFmpeg (WebAssembly)
Your files never upload anywhere
Progress shown while processing runs

Common mistakes to avoid

Choosing bitrates below the platform minimum
Re-encoding already-compressed files repeatedly

Examples

Input	Result
120 MB screen recording	18 MB at CRF 28, 720p - still crisp for sharing

Best used for

Getting a reliable answer for video compressor without installing an app
One-off tasks done in under a minute from any device
Checking results before committing them to something important
Working on a phone where desktop software is unavailable

Privacy

Audio and video processing runs on your device with WebAssembly FFmpeg; your files are never uploaded.

Frequently asked questions

What CRF should I pick?

23-26 is the transparent range; 28 for chat-sharing; each +6 halves the bitrate.

How does CRF quality targeting work?

CRF tells the encoder "keep this visual quality, use whatever bitrate that needs" - lower numbers mean better quality and bigger files; around 23-26 suits most sharing.

Should I also reduce the resolution?

Only if the destination does not need it - resolution reduction is the single biggest size lever, so a 1080p source destined for messaging apps compresses far further at 720p.

More like this

Zoven offers 200+ free browser tools. Browse by category - Calculators, Converters, Generators, Developer Tools and Media Tools - or read workflow guides on the Zoven blog.