Image Dimension & DPI Checker
Upload any image to instantly see its width, height, DPI, aspect ratio, file size, and color format. Nothing is uploaded, checked entirely in your browser.
Frequently Asked Questions
- Why does it say DPI is 'Not present in file'?
- DPI (dots per inch) is optional metadata that some cameras and editing tools write into JPEG files. Many images, especially PNGs, WebPs, and screenshots, don't include it at all. This doesn't affect image quality: pixel dimensions are what actually determine sharpness and print size.
- What's the difference between pixel dimensions and DPI?
- Pixel dimensions (width x height in px) are the actual amount of image data. DPI only matters when printing: it tells a printer how many of those pixels to pack into each inch of paper. The same image at 72 DPI and 300 DPI has identical pixel data and looks identical on screen; the file just claims a different print size.
- How is the aspect ratio calculated?
- We reduce the pixel width and height to their simplest whole-number ratio (like 16:9 or 4:3). If the reduced ratio has large numbers that don't match a common ratio, we show a decimal ratio instead, which is more useful for unusual crops.
- Do you store or upload my images?
- No. This tool only reads the file locally in your browser to display its properties. Nothing is uploaded or stored anywhere.