Check Image DPI
Upload an image to read its DPI resolution from metadata, or calculate a theoretical DPI based on your desired print size when no metadata exists.
How It Works
The DPI ('dots per inch') of an image can be declared directly in its EXIF metadata (XResolution/YResolution tags), but this is only indicative information, not a physical property of the pixels. This tool first reads this metadata if it exists; otherwise, it calculates a theoretical DPI from the number of pixels in the image and the print size you're targeting, which is in practice much more useful for judging whether an image is suitable for a given print.
Why isn't the DPI in metadata enough?
An image can display '72 DPI' in its metadata while being perfectly capable of a high-quality 300 DPI print if it contains enough pixels: the stored value is only an indication used by some software, not a physical limit. Calculating theoretically from the actual print size gives much more reliable information about the expected print quality.
What theoretical DPI is considered sufficient?
In general, 250–300 DPI is recommended for photo prints viewed up close, 120–150 DPI works for a poster seen from a few dozen centimeters, and below 100 DPI the risk of seeing individual pixels increases significantly on a surface viewed up close.
100% local processing: metadata is read in your browser via WebAssembly — your image is never sent to a server.