Video Compressor
Compress video files in your browser. Adjust resolution, bitrate and quality to reduce file size with full privacy.
How do I compress a video online?
Upload your video file, adjust the resolution, bitrate, and quality settings to your needs, then click compress. The tool processes your video entirely in the browser and provides a download link for the compressed file.
What settings affect video file size?
The main settings are resolution (lower means smaller file), CRF or quality level (higher CRF means more compression), bitrate (lower bitrate reduces file size), and audio quality. All these parameters directly influence the final output size.
Is my video data safe and private?
Yes, absolutely. All video processing happens locally in your browser using WebAssembly technology. Your video files are never uploaded to any server. Everything stays on your device and remains completely private.
What video formats are supported?
The tool supports all major video formats that your browser can decode, including MP4, WebM, MOV, AVI, and MKV. Output is typically in MP4 format for maximum compatibility.
How much can I reduce the video file size?
Compression ratio depends on the original file. Typically you can reduce file size by 30-70% with minimal visible quality loss. More aggressive settings can achieve even greater reduction.
Does compressing video reduce quality?
Some quality loss occurs with lossy compression, but it can be minimal. By carefully adjusting resolution and bitrate, you can achieve significant size reduction while maintaining acceptable visual quality.
Can I compress video on my phone?
Yes, the tool works on any device with a modern browser, including smartphones and tablets. The processing is done client-side, so it works on iOS, Android, and desktop platforms.
Is there a file size limit?
Since processing happens in your browser, the limit depends on your device's available memory. Generally, files up to several gigabytes can be processed on modern devices with sufficient RAM.
How long does compression take?
Processing time depends on video length, resolution, and your device's CPU power. A typical short video may take seconds, while longer high-resolution videos may take several minutes.
What is CRF in video compression?
CRF (Constant Rate Factor) is a quality-based encoding mode. Lower CRF values produce higher quality and larger files, while higher CRF values produce smaller files with more quality loss. Values between 18-28 are commonly used.
Can I batch compress multiple videos?
You can compress videos one at a time. Process each video sequentially for best results, as simultaneous processing of multiple large files may strain your device's memory.
Why should I compress my video?
Compressed videos are easier to share via email, messaging apps, and social media. They save storage space, reduce upload time, and are faster to stream. Many platforms have file size limits that compression helps you stay within.