How to Change Image DPI for Print

Why DPI Matters for Print

Printers measure detail in dots per inch. If your image's resolution is too low for the physical size you print, the result looks soft or pixelated. Setting the correct DPI before sending a file to print avoids expensive reprints.

Understanding PPI vs DPI

• PPI (pixels per inch) describes the pixel density of your source image.
• DPI (dots per inch) describes the printer's physical output density.

For a crisp print, your image PPI should meet or exceed the printer's DPI.

The 300 DPI Standard

Most professional printing targets 300 PPI. At that density the human eye cannot distinguish individual dots at a normal viewing distance, so photos appear smooth.

Step 1: Check Your Current Resolution

Open your image's properties or load it into an editor to see its pixel dimensions and current PPI. Note the physical size you intend to print.

Step 2: Open the DPI Changer

Use the Imgira DPI Changer. It adjusts the resolution metadata and, when needed, the pixel dimensions locally in your browser.

Step 3: Set the Target

Enter 300 for standard prints, or the specific value your print shop requests. Preview the effect on the estimated print size.

Step 4: Export

Save the adjusted file and send it to print. If the image was originally low resolution, increasing DPI alone will not invent new detail, so start from the highest quality source you have.

When Lower Resolution Is Fine

Screen-only graphics do not need 300 PPI. Export at lower values to keep file sizes small for web and social use.