Target a maximum file size for email and upload limits

Short answer

In ShrinkCut Compress → Custom (or adjust a preset), set a **target max file size in MB**. ShrinkCut estimates bitrate from the video’s duration so the encode aims under that cap — useful for email and awkward upload limits.

Steps

Open Compress / Convert and add your file.

Choose **Custom** (or start from Email / WhatsApp).

Enter the max size in MB your destination allows.

Pick H.265 or H.264, height, and speed as needed.

Encode and verify the output size in before/after preview.

When presets are enough

WhatsApp/messaging ≈ 16MB @ 720p

Email ≈ 10MB @ 480p

Summary

Max-size targeting beats guessing CRF when the platform’s limit is the only thing that matters.