Video Compressor
Reduce video file size by up to 90% while maintaining quality. Compress MP4, WebM, MOV videos for email, social media, and faster uploads.
Drag & drop your video
or click to browse files
Maximum file size: 500MB
Lightning Fast
Server-side compression using optimized FFmpeg encoding for quick results.
Quality Preserved
Smart compression maintains visual quality while dramatically reducing file size.
Share Anywhere
Compressed videos are perfect for email, social media, and messaging apps.
How to Compress Video Online
Step-by-Step Guide
- 1Upload your video - Drag and drop or select MP4, WebM, MOV, AVI, or MKV file (up to 500MB)
- 2Choose compression level - Select High (best quality), Medium, Low, or Very Low (smallest file)
- 3Select resolution - Keep original or downscale to 1080p, 720p, 480p, or 360p
- 4Compress & download - Click compress and download your smaller video file
Compression Levels Explained
~30-40% reduction. Best for archiving and professional use.
~50-60% reduction. Great balance for most purposes.
~70-80% reduction. Good for quick sharing via email.
~80-90% reduction. Maximum compression for smallest file.
Why Compress Videos?
- ✓Send large videos via email (most limit 25MB)
- ✓Upload faster to YouTube, TikTok, Instagram
- ✓Save storage space on phone and computer
- ✓Share via WhatsApp, Telegram, Discord
- ✓Reduce bandwidth usage for websites
- ✓Meet platform file size requirements
How Video Compression Actually Works
A video file is a long sequence of frames, and most of the time very little changes from one frame to the next: the background of a talking-head clip stays almost identical for seconds at a time. Modern codecs like H.264 exploit this by storing only the differences between frames instead of every full picture, then throwing away fine detail the eye is unlikely to miss. Compression is the process of tuning how aggressively that detail is discarded. Push it gently and the file barely shrinks but looks flawless; push it hard and the file becomes tiny but softer, with visible blocky artifacts in busy scenes.
Two knobs control this behind the scenes. The first is CRF (Constant Rate Factor), which you can think of as a single quality dial rather than a size target. A lower CRF means higher quality and a bigger file; a higher CRF means more compression and a smaller file. The encoder then spends however many bits are needed to hit that quality level, using fewer bits on simple scenes and more on complex, fast-moving ones. The second knob is bitrate, the amount of data allotted to each second of video. Lowering the bitrate directly shrinks the file, but starve a detailed scene of bits and quality drops. Our compression presets translate the plain-language levels below into appropriate CRF and bitrate settings for you, so you never have to touch the raw numbers.
The compression level you choose sets that quality-versus-size balance: High Quality trims roughly 30-40% for archiving and professional use, Medium (the recommended setting) reaches around 50-60% with a barely perceptible quality change, Low reaches 70-80% for quick email sharing, and Very Low pushes 80-90% for the smallest possible file. Separately, lowering the resolution (for example from 1080p down to 720p) reduces the pixel count itself and can shave off another chunk of size, which is worthwhile when the video will only ever be viewed on a phone screen where the extra pixels are wasted anyway.
This compressor accepts MP4, WebM, MOV, AVI, and MKV files up to 500 MB and always outputs an MP4 encoded with H.264 for maximum compatibility. Files are uploaded to our server, compressed with FFmpeg, and returned for download. Processing is server-side, not in your browser, so larger videos may take a few minutes.
Frequently Asked Questions
Can I compress a video without losing quality?
Some quality loss is inherent to compression, but at the High Quality or Medium preset the change is usually invisible in normal viewing. These levels remove detail your eye is least likely to notice while still cutting file size significantly. Only the Low and Very Low presets produce visible softening in exchange for the smallest files.
What compression level should I use?
Medium is the recommended all-purpose setting, cutting size by roughly 50-60% with barely noticeable quality change. Use High Quality for archiving or professional work, Low for quick email sharing, and Very Low when you need the absolute smallest file and can accept softer footage.
What file size and formats are supported?
You can upload MP4, WebM, MOV, AVI, and MKV videos up to 500 MB. Whatever format you upload, the compressed result is always delivered as an MP4 encoded with H.264 for the widest device and platform compatibility.
Does lowering the resolution help reduce size?
Yes. Downscaling from, say, 1080p to 720p reduces the number of pixels in every frame, which lowers file size on top of the compression preset. It is a smart choice when the video will only be watched on a phone or embedded small on a page, where the extra resolution would be wasted.
Why does compression take a few minutes?
Your video is uploaded to our server and re-encoded frame by frame with FFmpeg, which is computationally intensive for long or high-resolution clips. Processing is server-side rather than in your browser, so larger files naturally take longer than smaller ones.
Is the compressed video still playable everywhere?
Yes. The output is a standard H.264 MP4, the most universally supported video format. It plays on phones, computers, browsers, smart TVs, and social platforms, and imports cleanly into video editors.
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