โ Frequently Asked Questions โ Video Compressor
How much can I reduce the video file size?
Using the Small Size preset, you can typically reduce file size by 60โ80% compared to the original. Results vary depending on the original video's bitrate and resolution. A 100MB MP4 video can often be compressed to 20โ40MB with acceptable quality. The Balanced preset gives 40โ60% reduction with good visual quality.
Why is the output WebM and not MP4?
Browser-based video processing uses the MediaRecorder API, which outputs WebM natively. MP4 encoding requires native codec libraries not available in browsers. WebM is a high-quality open standard supported by Chrome, Firefox, Edge, and VLC. To convert WebM to MP4 after compressing, use HandBrake (free desktop app).
What is video bitrate?
Bitrate is the amount of data used per second of video, measured in kilobits per second (kbps). Higher bitrate = better quality but larger file size. For web streaming: 500โ1000 kbps is good for 480p, 1000โ2500 kbps for 720p, 2500โ5000 kbps for 1080p. The tool's presets handle this automatically.
Is there a file size limit?
The tool supports video files up to 500MB. Larger files require more browser memory and processing time. For files over 500MB or for MP4 output, we recommend using HandBrake (free) or FFmpeg on your desktop for much faster and more efficient compression.