Image Dimensions Checker

Width, height, megapixels, and DPI

The most basic facts about an image — how many pixels wide and tall it is, its megapixel count, and its aspect ratio — aren't always easy to find without opening an editor. This checker reads them instantly: drop an image and see its exact dimensions, resolution, and file size in one place.

It also reads the DPI (dots per inch) tag, which matters for printing. DPI has no effect on how an image looks on a screen — there, only pixel dimensions count — but it determines how large the image prints. The tool shows both, so you know what you're working with.

How to check image dimensions

1. Open your image. Drag it onto the tool, choose a file, or paste it.
2. Open the Size & DPI tab. See the width, height, megapixels, aspect ratio, DPI, and file size.
3. Plan your print or resize. Use the print-size estimate, or send the image to our resize tool to change it.

DPI vs pixels — what matters when

For anything on screen — websites, social media, presentations — ignore DPI and look only at pixel dimensions. For printing, aim for around 300 DPI: a 3000 × 2000 px photo prints cleanly at about 10 × 7 inches.