Compress Video for Web
Reduce video file size for fast web page loading. Output is H.264 MP4 with the faststart flag so playback begins immediately in browsers.
How to compress Video for Web
- Upload your video (MP4, MOV, WebM, AVI).
- Select Medium quality for the best size/quality balance for web.
- Click Compress and download the optimized MP4.
- Upload to your website or CMS.
Privacy by design — see the FAQ below for how this tool handles your files. Many Utilio tools run entirely in your browser.
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Frequently asked questions
What video format is best for websites?
H.264 MP4 is the most universally compatible format for web. All major browsers support it, and it can be served directly or via a CDN.
What bitrate should I target for web video?
For HD 1080p web video, 2–5 Mbps is a good target. For 720p, 1–2.5 Mbps. This compressor uses CRF-based encoding which targets quality rather than a fixed bitrate, resulting in smaller files for simple scenes.
What is the faststart flag and why does it matter?
The -movflags +faststart flag moves the MP4 metadata to the beginning of the file, allowing browsers to start playing the video before it has fully downloaded — just like streaming.
Is my video uploaded to a server?
No. All compression runs in your browser using WebAssembly. Your files are not uploaded to Utilio servers for this tool.