How to use the Video Compressor
- Choose the video.
- Pick "Quality level" for the best look at a smaller size, or "Target file size" to hit an exact MB limit.
- Lower the resolution if you need a much smaller file; 720p is ideal for phones.
- Click Compress video and download.
How video compression works
The compressor re-encodes your video with H.264, the most efficient codec every device plays. "Recommended" removes detail the eye barely notices, often cutting phone videos by 50–80%. "Target file size" calculates the bitrate needed to land just under the size you choose.
Biggest size savings
- Lower the resolution: 4K → 1080p or 1080p → 720p shrinks files a lot.
- Shorter videos are smaller: trim what you do not need first.
- Videos with lots of motion or grain need more data to look good.
Good to know
Compression uses H.264 (x264, "veryfast" preset) with either a quality target (CRF) or a calculated bitrate for target sizes. Audio is re-encoded to AAC. The file is never uploaded, so even private videos can be compressed safely.
Supported files
MP4, MOV, MKV, WEBM, AVI, WMV, FLV, M4V, 3GP, 3G2, MPEG, MPG, TS, MTS, M2TS, VOB, OGV, MXF, ASF, DIVX, F4V, SWF, DV, MOD, TOD, WTV, RM and RMVB video, with H.264, HEVC, VP8, VP9, MPEG-4, MPEG-2, WMV, Theora and other codecs. AV1 videos cannot be read in the browser yet. Files up to 1 GB each.
Frequently asked questions
Does compression lower quality?
A little, by design. "Light" and "Recommended" are hard to tell apart from the original on a phone. "Strong" and very small target sizes show visible blur in busy scenes.
Is there a watermark?
No, never.
Is the Video Compressor free?
Yes, completely free, with no sign-up and no watermark. Files up to 1 GB each can be converted, and there is no daily limit.
Are my files safe?
Yes. Files are converted locally in your browser and are never uploaded. When you close the page, nothing is left behind.
Can I use it on my phone?
Yes. Open the page in your phone's browser and choose a file. Phones have less memory than computers, so very large files are better converted on a laptop or desktop.