DPI Checker - Free Online | ToolXHub
Use DPI Checker online for free, no download required. ToolXHub offers hundreds of fun online tools.
Upload
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 DPA (dots per inch) value, and the physical print size calculated based on this DPA. If the picture does not have embedded DPA information (like most web pictures), it will display as the default 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 a file locally in the browser to read this information without having to upload the file.
Printing usually requires more than 300 PPIs, and web display only requires 72-96 PPIs. The tool can quickly determine whether an image is clear enough for printing, or whether a web page is too large to compress.
The online DPA inspection tool checks the resolution information of the picture (pixel size, DPA/PPI, print size) to help determine whether the picture meets the print requirements.