Check the DPI of an image

Drop an image to see the DPI stored in the file, its size in pixels, and how large you can print it with good quality.

Private by design: your files are processed in your browser and never uploaded.

Questions

Why does my image say 72 DPI?

Phones, cameras and most apps write 72 or 96 DPI by default. It does not mean the image is low quality: what matters for printing is the size in pixels.

What if the file has no DPI?

Some images, especially from screenshots and websites, store no DPI at all. Programs then assume 72 or 96. You can set it with our DPI changer.

How big can I print my image?

Divide the pixels by 300 to get inches at print quality. A 3000 × 2400 px image prints at 10 × 8 inches at 300 DPI.

Where the DPI is stored

JPG files can store the resolution in two places: the JFIF header and the EXIF data written by cameras and phones. PNG files use a block called pHYs. This checker reads all of them and tells you which one it found, because programs do not always agree: Photoshop reads EXIF first, while many other apps read JFIF.

DPI is not image quality

Two files with the same pixels look identical on screen, whatever their DPI says. What decides print quality is how many pixels you have for the size you want. That is why this tool shows the largest size your image can print at 300 DPI (sharp, close up) and 150 DPI (fine for posters seen from a distance).