Frequently Asked Questions

Quick answers about how Compress Videos works, privacy, and quality.

Does my video upload anywhere?

No. Compression runs locally in your browser. Your video never leaves your device.

Will I lose quality?

All compression trades size for quality. Use the percentage slider for a quick reduction, or adjust codecs and dimensions for more control.

Which browsers are supported?

WebCodecs is supported in Chrome, Edge, and Safari. If your browser does not support it, the app will let you know.

Why did my file not hit the exact target size?

Target size is an estimate. The encoder balances bitrate and quality, so results can land above or below the target depending on the source content.

Can I set an exact output size?

You can set a target size in MB in Advanced Settings, but exact sizes are not guaranteed. Reducing resolution helps hit smaller sizes.

What formats and codecs are available?

Available formats and codecs depend on your browser and hardware. Open Advanced Settings to see the options for your device.

What powers the compression workflow?

We use MediaBunny to power core media workflows, helping keep compression fast and reliable across devices.

Still have questions? Visit the support page.