Frequently Asked Questions

Yes, VideoCompressor is completely free. There are no limits on the number of videos you can compress, and no account or sign-up is required.

No. VideoCompressor never adds watermarks to your compressed videos. What you download is a clean, unmodified compressed version of your original file.

No. VideoCompressor is entirely browser-based. Your video files are never uploaded to any server — all compression happens locally on your device using WebAssembly technology. Your files stay 100% private.

The maximum upload size is 500MB. This limit ensures stable, fast processing across all devices and browsers. If your file exceeds 500MB, try trimming it to a shorter clip before uploading.

VideoCompressor supports most common video formats including MP4, MOV, AVI, MKV, WebM, WMV, FLV, 3GP, M4V, and TS files.

Depending on your original video and chosen settings, you can typically reduce file size by 50–90%. Using the Target File Size mode, you can specify an exact maximum output size such as 25MB for email or 16MB for WhatsApp.

VideoCompressor offers four modes: Auto (recommended smart preset), Target File Size (enter desired MB), Quality-based (CRF slider for fine control), and Bitrate-based (manual kbps input).

Yes. In the Advanced Options section, you can downscale resolution (1080p, 720p, 480p, 360p) and reduce frame rate (60, 30, or 24 fps) to further reduce file size.

Yes. VideoCompressor works on iOS Safari and Android Chrome. The 500MB file size limit ensures stable performance on mobile devices with limited memory.

CRF (Constant Rate Factor) is a quality setting for video encoding. Lower CRF values (e.g., 18) produce higher quality and larger files. Higher values (e.g., 35) produce smaller files with lower quality. The default of 28 provides a good balance.