Image DPI checker
Choose a PNG or JPEG to see the DPI stored in it, its size in pixels and the size it prints. You can change the DPI on the spot.
Free, no account. The file is read by code running in your browser. It is not uploaded, and nothing about it is stored.
How to check the DPI of an image
- Choose your PNG or JPEG, or drop it on the box.
- Read the DPI stored in the file, the pixel size and the print size.
- If you need a different DPI, type it and download the changed file.
What the numbers mean
- Pixels: the real size of the picture. This is what decides how sharp it can print.
- DPI in the file: the resolution the file states, and where it was found. Many pictures state none; software then assumes 72 or 96.
- Prints at: the pixels divided by the DPI, in inches and centimetres.
- At 300 DPI: the largest size it prints with the sharpness expected of a photo held in the hand.
Is my image good enough to print?
Ignore the stored DPI and look at the last line. If the “At 300 DPI” size is at least as large as the print you want, the picture has enough pixels. If it is about half the size you want, it will print at 150 DPI, which is fine for a poster on a wall and soft in the hand. The DPI calculator turns any print size into the pixels it needs.
Other ways to check
On Windows, right-click the file, choose Properties, then Details, and look for horizontal and vertical resolution. On a Mac, open the picture in Preview and choose Tools, Show Inspector. Both show the same stored number this page reads.
Questions
Why does my image say 72 or 96 DPI?
Those are the defaults that cameras, phones and screenshot tools write, or that software assumes when a file states nothing. They say nothing about quality. A 12 megapixel photo marked 72 DPI prints perfectly well at 300.
Is this for checking mouse DPI?
No. Mouse DPI is how far the pointer moves for each inch the mouse travels. This page is about the resolution of picture files.
Is my image uploaded?
No. The file is read in your browser and never leaves your device.