RatilioFree creative tools

Guides

Short, practical explanations that go with Ratilio's tools.

Aspect Ratios

Shapes, ratios and resizing without distortion.

16:9 vs 4:3 Aspect Ratio: What's the Difference?16:9 is wide, 4:3 is squarer. See the maths, common sizes, and what really happens when you crop, pad or stretch a photo from one shape to the other.

Print Resolution

DPI, PPI and how large an image can print.

DPI vs PPI: What's the Difference?PPI is how many image pixels fill an inch; DPI is how many dots a printer places per inch. See the difference with one image at four print sizes.
Print Sizes in Pixels: 4×6, 5×7, 8×10, A4 and More (Chart)Pixel sizes for common prints at 300 and 150 PPI, including 4×6, 5×7, 8×10, 11×14, A5, A4 and A3, plus how to handle cropping, orientation and smaller images.