Video Size Reducer & Compressor is a free, browser-based tool that re-encodes your video with H.264 at an adjustable quality level to reduce file size. It uses ffmpeg compiled to WebAssembly, so your video never leaves your device — expect longer processing times than a server-based tool since compression runs on your own device.
How to use the Video Size Reducer & Compressor
- Upload your video file.
- Adjust the compression slider \u2014 higher values mean smaller files but lower quality.
- Click Compress video \u2014 large files can take several minutes since processing runs on your own device.
- Download the compressed video and compare the size reduction shown.
Why use FreeToolsNets's Video Size Reducer & Compressor?
- 100% free, with no usage limits and no account required.
- Everything runs locally in your browser — nothing you type is uploaded or stored on a server.
- Works on desktop, tablet and mobile in any modern browser.
- No installation, no plugins, and no ads blocking the tool itself.
Frequently asked questions
Why is this slower than an online compressor?
Processing happens entirely on your device via WebAssembly rather than powerful server hardware, so it takes longer \u2014 in exchange, your video is never uploaded anywhere.
What compression level should I use?
23-28 is a reasonable balance for most videos; go higher (up to 35) if file size matters more than quality.
Is this tool free to use?
Yes, completely free on FreeToolsNets, with no sign-up and no limits.
Is my data sent to a server?
No. Everything runs locally in your browser using JavaScript — nothing you enter is uploaded anywhere.
Does it work on mobile?
Yes, the widget is fully responsive and works on phones, tablets and desktops.