Online Video Compressor
Upload a video, pick a compression level, and download a smaller file. Works with MP4, MOV, AVI, WEBM, MKV, and more.
Drag & drop your video here
or click to browse files
Supports MP4, MOV, AVI, MKV, WEBM, FLV
How to compress a video online
Upload your video
Drag your file into the upload area or tap "browse" to pick one from your device. We accept MP4, MOV, AVI, MKV, WEBM, FLV, and most other common video formats. There's no signup, no account creation, and no email required.
Choose your compression level
Pick from three presets: light (barely noticeable reduction, preserves almost all detail), balanced (solid size reduction with good visual quality), or heavy (smallest file, some visible quality loss). You can also change the output resolution or switch the format if needed.
Download your compressed video
Processing takes a few seconds to a couple of minutes depending on the file. When it's done, you'll see the original size, the new size, and the percentage saved. Hit download and you're done.
Why compress a video?
Video files are big. A one-minute 1080p clip shot on a modern phone can run 100MB to 200MB. That's fine for local storage, but it creates problems the moment you try to share it.
Email attachments usually cap at 25MB. Gmail, Outlook, and most corporate mail servers will reject anything larger. If you need to email a video, compression is the fastest fix.
WhatsApp limits video sends to 2GB on most devices, but the upload is slow and the app compresses the file itself (badly). Compressing beforehand gives you control over quality and keeps the send time reasonable.
Discord has a 25MB limit on free accounts and 50MB for Nitro users. If you're sharing clips in a server, compression is basically mandatory.
Web and social media uploads go faster with smaller files. If you're embedding video on a website, smaller files also mean faster page loads and better Core Web Vitals scores, which affects SEO.
Storage is another reason. If you're archiving old footage or clearing space on a phone, compressing at a balanced setting can cut file sizes by 50 to 70 percent without a visible difference in day-to-day viewing.
What happens when you compress a video?
Video compression works by finding and removing information that viewers won't notice. A raw video stores every pixel of every frame individually, which takes a lot of space. A compressed video encodes the differences between frames instead, so frames that look similar take up much less data.
Our compressor uses H.264 (also called AVC), which is the most widely supported video codec in the world. It works on every browser, every phone, and every media player. We use a method called CRF (Constant Rate Factor) to control quality: lower CRF values keep more detail, higher values compress more aggressively.
When you pick "balanced" compression, we use a CRF setting that typically cuts file size by 40 to 60 percent while keeping the video looking clean at normal viewing distance. "Heavy" compression pushes that further. You can tell the difference if you look closely, but for screen recordings, presentations, and casual clips, it's usually fine.
Resolution changes can also reduce file size. A 4K video downscaled to 1080p before compression will be much smaller than compressing the 4K version directly. If the video is going on a phone screen or a web embed, 1080p or even 720p is often plenty.
Supported video formats
You can upload and compress videos in any of these formats:
The output defaults to the same format as your source file. If you upload an MP4, you get a compressed MP4 back. You can also change the output format during compression if you want to convert and compress at the same time. MP4 with H.264 is the safest choice for compatibility across devices and platforms.
Frequently asked questions
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