Change DPI
Change the DPI/PPI metadata of an image without changing its pixel dimensions.
Check Image DPI
Check the embedded DPI/PPI, pixel dimensions and print size of JPG, PNG and WebP images directly in your browser.
Your files stay on your device.
Files are processed locally in your browser and are not uploaded to our servers.
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JPG, PNG and WebP · Up to 50 MB
Your image
- Format
- File size
- Dimensions
- Reading…
Reading resolution…
Result
How to check the DPI of an image
- Choose a JPG, PNG or WebP image.
- The tool reads the resolution stored in the file and shows where it comes from (EXIF, JFIF or PNG pHYs).
- You see the pixel dimensions and the resulting print size in inches and centimetres.
To set a different value, use Change Image DPI. To see all other metadata of a photo, use View Image Metadata.
What does image DPI mean?
A digital image is made of pixels. Many files also store a resolution value that says how many of those pixels should fill one inch when the image is printed. That value is what most programs call DPI. It does not change the pixels themselves; it only tells a printer or layout program how large to print them.
DPI vs PPI
Strictly speaking, DPI (dots per inch) describes printers, which put down ink dots. For image files, PPI (pixels per inch) is the more accurate term, because the file stores pixels per inch. In everyday use both mean the same thing for an image file, so this tool accepts both words and shows values as PPI.
How does DPI affect print size?
Print size is pixels divided by DPI. An image of 3000 × 2000 pixels at 300 DPI prints at 10 × 6.67 inches (25.4 × 16.93 cm). The same image at 150 DPI prints twice as large, at 20 × 13.33 inches, with each pixel covering more paper.
Does changing DPI improve image quality?
No. Changing the DPI value does not add detail, because no pixels are added. It only changes the size at which the same pixels are printed. If you need more pixels, Resize Image can enlarge an image, but enlarging cannot create detail that was never captured. If you want a smaller file instead, use Compress Image.
What if an image has no DPI value?
Many images have none: screenshots, images from the web and files saved by some apps. The tool then says so instead of showing an assumed 72 or 96 DPI, because such a number would not be in your file. It shows what the image would print at with 150 and 300 PPI instead, clearly marked as a calculation.
Your images stay on your device
Everything happens in your browser. The image is not uploaded to any server.
Frequently asked questions
How do I check the DPI of an image?
Choose the image above. The tool reads the resolution stored in the file, shows where it comes from and calculates the print size. Nothing is uploaded.
Is 300 DPI good for printing?
300 DPI is a common guideline for prints viewed up close, such as photos and brochures. It is not a guarantee: what is sharp enough depends on the printing method, the viewing distance and the printer. Posters seen from a distance often need less, and some print services state their own requirements.
What is the difference between DPI and PPI?
PPI (pixels per inch) describes how many image pixels fill one inch. DPI (dots per inch) describes how many ink dots a printer puts down. For image files, the stored value is technically PPI, but most programs call it DPI.
Why does my image have no DPI value?
Storing a resolution is optional. Screenshots, web images and files from many apps have none. The tool then says so instead of assuming 72 or 96 DPI.
Does a higher DPI mean more pixels?
No. The DPI value does not change the number of pixels. A higher DPI means the same pixels are printed closer together, so the print is smaller.
Can the same image be 72 DPI and 300 DPI?
Yes, the pixels can be identical and only the stored value differs. Some files even store two different values in different places; the tool shows both in that case.
Are my images uploaded?
No. The image is read in your browser and never leaves your device.