How to check the DPI of an image
- Add one or more images (JPG, PNG or WebP).
- Read the results: DPI, pixel size, megapixels, file size in KB, print size, rotation and location for each image.
- Need a different DPI? Click “Change DPI” to set it without changing the picture.
What each value means
| Value | What it tells you |
|---|---|
| DPI (JFIF / EXIF / PNG) | The print resolution stored in the file. A JPG can store it twice; if the two differ, programs disagree about the DPI. |
| Not set | No DPI stored: programs assume 72 or 96, and forms that require 300 DPI reject the file. |
| Pixels and megapixels | The real detail in the image. For a sharp print you need about 300 pixels per inch. |
| Print size | Pixels ÷ DPI: the size the image prints at by default, plus the size at 300 DPI. |
| Orientation | Whether the photo relies on a rotation tag that some websites ignore. |
| Location | Whether the file contains GPS coordinates. |
Common DPI checks
- Print shops want 300 DPI at the print size: check that pixels ÷ 300 is at least the size you order, or use the print size calculator.
- Application forms sometimes check the DPI of photos and signatures: set it with convert to 300 DPI.
- Screens ignore DPI completely; only the pixel size matters on the web.
Frequently asked questions
Why do different programs show different DPI for the same photo?
A JPG can store DPI in two places: the JFIF header and the EXIF data. Windows and Photoshop usually read EXIF, other programs read JFIF, and if the two disagree you get different answers. This tool shows both.
What does “not set” mean?
The file has no DPI value, so programs assume 72 or 96 DPI. Forms that check for 300 DPI will reject it even if it has plenty of pixels. Use the change image DPI tool to set it without changing the picture.
Is DPI the same as quality?
No. DPI only sets the print size. Sharpness depends on the number of pixels: for a sharp print you need about 300 pixels per inch of paper.
Which formats can I check?
JPG/JPEG, PNG and WebP, up to 50 at once.
Are my images uploaded?
No. They are read in your browser and never leave your device.
Last updated 2026-10-24.