DPI Checker - Free Online | FunToolX
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About this tool
DPI Checker is a free online tool. Check pixel dimensions, DPI and print size of an image.
After uploading an image, the tool displays the pixel width and height of the image, the embedded DPI (dots per inch) value, and the physical print size calculated based on this DPI. If the picture does not have embedded DPI information (like most web pictures), it will be displayed as the default DPI of 72 or 96.
DPI information is stored in the metadata of the picture file (JFIF headers for JPEG or pHYs blocks for PNG). The tool parses the binary data of the file locally in the browser to read this information without uploading the file.
Printing usually requires more than 300 DPI, and web page display only requires 72-96 DPI. This tool can quickly determine whether an image is clear enough for printing, or whether a web page is too large and needs to be compressed.
Online DPI inspection tool to check the resolution information of the picture (pixel size, DPI/PPI, print size) to help determine whether the picture meets printing requirements.