How to Compress a Video Online (Free)
Large video files eat storage, blow past upload limits, and take forever to send. Here's how to shrink one down in your browser, no software to install.
Steps
- Upload your video at Stelluna's Video Compressor — MP4, MOV, WEBM, MKV, or AVI, up to 300MB.
- Pick a quality level. High Quality, Balanced, or Smallest File.
- Wait a moment. Compression runs using your device's own video encoder, right in the browser.
- Preview the result. Compare the new file size against the original before downloading.
- Download. The compressed video, always MP4 (H.264 + AAC).
Ready to try it? Free, instant, your video never leaves your device.
Open Video CompressorWhich quality level should I pick?
High Quality (~8 Mbps) keeps the most detail and is best if you'll watch it on a big screen. Balanced (~4 Mbps, capped at 1080p) is the right choice for most sharing and uploading. Smallest File (~1.5 Mbps, capped at 720p) is for when file size matters more than sharpness — messaging apps, slow connections.
FAQ
Is it free?
Yes — no account, no watermark, no limit on how many videos you compress.
Does my video get uploaded anywhere?
No. Compression runs entirely in your browser using your device's own video encoder — the file never leaves your device.
What's the output format?
Always MP4 (H.264 + AAC), the most broadly compatible format, regardless of what you uploaded.
What's the difference between the quality levels?
High Quality preserves the most detail at ~8 Mbps; Balanced (~4 Mbps, up to 1080p) is a good middle ground; Smallest File (~1.5 Mbps, up to 720p) gives the smallest download.
Do I need to sign up?
No.