Video Compressor

Upload your video, pick a quality level, download a smaller file.

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Video Compressor

Upload your video, pick a quality level, download a smaller file. Free, no sign-up, runs entirely in your browser.

How it works

Upload your video. MP4, MOV, WEBM, MKV, or AVI, up to 300MB.
Choose a quality level. High Quality, Balanced, or Smallest File.
Download the compressed video. Entirely in your browser — larger videos take a little longer.

Why Stelluna

Free — no sign-up needed
Runs in Your Browser — your video never leaves your device
MP4 Output — always compresses to MP4, the most widely compatible format

Frequently Asked Questions

Is it free?
Yes, no account needed.

Does my video get uploaded anywhere?
No, compression runs entirely in your browser using your device's own video encoder — your video is never sent to a server.

What's the output format?
Always MP4 (H.264 + AAC), the format with the broadest compatibility. Input can be MP4, MOV, WEBM, MKV, or AVI, up to 300MB.

What's the difference between the quality levels?
High Quality (~8 Mbps) preserves the most detail, Balanced (~4 Mbps, up to 1080p) is a good middle ground for most uses, and Smallest File (~1.5 Mbps, up to 720p) produces the smallest download.

Do I need to sign up?
No.