Everything you need to know about Resize
Resize changes the pixel dimensions of your image using high-quality resampling. Specify your target size in pixels, inches, or millimeters, with DPI settings for print/engraving output. Aspect ratio can be locked to prevent distortion.
Parameters
- Unit
Choose the measurement unit for entering dimensions: pixels (px), inches (in), or millimeters (mm). When using inches or mm, the DPI value determines how many pixels are needed. - Width / Height
Enter your target dimensions. When aspect ratio is locked, changing one value automatically adjusts the other to maintain proportions. - DPI
Dots per inch – determines the relationship between physical size and pixel count. Higher DPI means more pixels per inch (sharper prints, smaller physical size). Common values: 72 (screen), 150 (draft print), 254 (laser engraving), 300 (quality print). - Keep Aspect Ratio
When checked, width and height are linked – changing one automatically calculates the other to prevent image distortion.
Upscaling Limits
Standard resampling allows up to 30% enlargement (1.3× the original size). Beyond this, quality degrades significantly. For larger upscaling, use the AI Upscaler first to add genuine detail, then resize as needed.
DPI & Physical Size
Your image has a fixed number of pixels. When you specify a physical size (inches/mm) and DPI, the math is simple: Pixels = Size × DPI. If your image doesn't have enough pixels for the requested size at the given DPI, you'll see a warning.
Examples
- 1000px image at 100 DPI = 10 inches
- 1000px image at 300 DPI = 3.33 inches
- Need 6 inches at 300 DPI? You need 1800 pixels.
Tips
- Downscaling is always safe and often improves image quality
- For print: use 300 DPI minimum for sharp results
- For laser engraving: 254 DPI (10 dots/mm) is common
- For screen/web: 72–96 DPI is typical, but pixel dimensions matter most