Pixels ↔ print size (in/cm) via DPI.
Pixels: 3000 × 2000 Inches: 10 × 6.667 in cm: 25.4 × 16.933 cm DPI: 300
Yes.
No.
Rotate and flip images in the browser (canvas).
Rasterize SVG to PNG at a chosen scale.
Create 1200×630 Open Graph images from a template.
Export iOS/Android icons and favicon sets as ZIP.