# Free Image DPI Checker

> Check the DPI, the size in pixels, and the print size of a JPEG or PNG, free.

Canonical: https://bannerify.co/tools/image-dpi-checker

Check the DPI of a JPEG or PNG in the browser. The image stays on your device.

## Steps

1. Choose a JPEG or PNG file, or drop it on the box.
2. See the size in pixels, the DPI that the file stores, and the print size at 72, 150, and 300 DPI.
3. To change the DPI, enter a new value and download a copy. The pixels stay the same.

The checker reads the DPI fields that apps write: JFIF, EXIF, XMP, and Photoshop data in a JPEG, and the pHYs chunk, EXIF, and XMP in a PNG. A file without a DPI value shows "Not set", and apps then use their default, often 72 or 96. For a sharp print at 300 DPI, an image needs 300 pixels for each inch: 1200 × 1800 pixels for a 4 × 6 inch photo, and about 2480 × 3508 pixels for A4.