Free Online Video Compressor

Reduce video file size while maintaining quality. Choose your compression level and download instantly.

Select a video file

Click or drag a video file here
Supports MP4, WebM, MOV, AVI, MKV (up to 2 GB)

Compression level

All processing happens in your browser. No files are uploaded to any server.

Compress Videos Online Without Losing Quality

Large video files can be a challenge when sharing, uploading, or storing. The SaveOnlineVideos Video Compressor solves this by reducing your video file size directly in your browser. Powered by FFmpeg WebAssembly, this tool offers three compression levels to balance quality and file size according to your needs. No software installation, no account creation, and no file uploads to external servers.

Video compression works by re-encoding the video with a higher CRF (Constant Rate Factor) value, which tells the encoder to use fewer bits per frame. Our light preset uses CRF 23 for minimal quality loss, medium uses CRF 28 for a balanced approach, and heavy uses CRF 35 for maximum size reduction. The H.264 codec ensures broad compatibility across all devices.

How to Compress a Video

Upload your video

Click the upload area or drag and drop your video file. Supports MP4, WebM, MOV, AVI, MKV, and more.

Choose compression level

Select Light for minimal quality loss, Medium for balanced results, or Heavy for maximum file size reduction.

Compress and download

Click Compress Video. Watch the progress bar and see the before/after file size comparison when done.

Benefits of Video Compression

Faster Uploads & Sharing

Smaller files upload faster to email, cloud storage, and social media platforms. Save time and bandwidth.

Save Storage Space

Free up disk space on your device by compressing videos without deleting them. Perfect for archiving.

Smooth Streaming

Compressed videos load and buffer faster, providing a smoother viewing experience for your audience.

Email-Friendly Sizes

Most email services limit attachments to 25 MB. Compress videos to fit within these limits easily.

Use Cases

Social Media Content

Compress videos before uploading to social platforms. Smaller files upload faster and maintain acceptable quality for online viewing.

Email Attachments

Reduce video size to fit within email attachment limits. Perfect for sending clips to clients, colleagues, or friends.

Website Performance

Optimize videos for web embedding. Smaller video files improve page load times and reduce bandwidth costs.

Mobile Storage

Free up space on your phone or tablet by compressing recorded videos without losing the memories.

Frequently Asked Questions

How much can I compress my video?

Compression results vary depending on the original video. Light compression typically reduces file size by 20-40%, medium by 40-60%, and heavy compression can reduce size by 60-80%. The trade-off is always between file size and visual quality.

Does video compression reduce quality?

Some quality loss is inevitable with compression, but our tool uses optimized H.264 encoding settings. Light compression produces nearly imperceptible quality loss. Medium compression offers a good balance. Heavy compression is noticeable but suitable for quick sharing or previews.

What video formats are supported?

You can upload videos in MP4, WebM, MOV, AVI, MKV, and other common formats. The compressed output is always in MP4 format with H.264 encoding, which is the most universally compatible format across all devices and platforms.

Is there a file size limit?

The compressor supports video files up to 2 GB. Since processing happens in your browser using WebAssembly, larger files require more RAM. For best results with files over 500 MB, use a desktop computer with at least 8 GB of RAM.

Are my videos uploaded to a server?

No. All compression happens entirely in your browser using FFmpeg WebAssembly. Your video files never leave your device, ensuring complete privacy and security throughout the process.

Why is compression taking a long time?

Compression time depends on file size, video length, and your device's processing power. WebAssembly processing is fast but not as quick as native software. Shorter videos under 100 MB typically compress in under a minute on modern hardware.