Compress Video

Compress Video features

• 01

  Dial in the size you want

  A single quality slider drives the encoder: lower values produce small files suitable for email or WhatsApp, higher values preserve near-original detail. The exact output size is shown after compression.

• 02

  Keeps the original format

  Compressing an MP4 gives you an MP4, a MOV gives you a MOV, and so on. No container swap is needed — just a lighter version of the same file.

• 03

  Browser-only and private

  The compressor uses FFmpeg compiled to WebAssembly, which means the whole process happens on your device. Your video is never uploaded to a server.

Compress Video FAQ

How do I compress a video online?

Drop your MP4, MOV, WebM, or MKV file into the tool, pick a quality level, and click Compress. When it finishes you'll see the final size and can download the compressed video.

How much smaller will my video be?

It depends on the source bitrate. Phone recordings and screen captures often shrink to 30–50% of the original at the default quality. Footage that's already been compressed will shrink less.

Does compression reduce quality?

Yes — every lossy compressor trades quality for size. The slider lets you choose where on that curve you want to land. For most content the default setting is visually close to the source.

What formats are supported?

MP4, MOV, WebM, and MKV up to 1 GB. The output format matches the input.

Are my videos uploaded?

No. Everything runs in your browser using WebAssembly, so your video file never leaves your device.