JPEG DPI
Where JPG DPI is stored
JPEG files can store print density in JFIF headers, EXIF resolution tags, or both. Some files do not store a DPI value at all. The checker reports what it finds, and the converter writes a copy with updated browser-readable density metadata.
How to change JPG DPI
- Open the main tool and choose a .jpg or .jpeg file.
- Read the current DPI report and estimated print size.
- Choose 300 DPI or enter another target value.
- Download the converted JPG and verify it in your desktop app.
Changing JPG DPI is not the same as upscaling
A JPEG can have a 300 DPI tag and still be too small for a large print. If your file is 1200 x 1200 px, it is 4 x 4 inches at 300 DPI. For a larger sharp print, start with more pixels or use a separate resampling workflow.
How to verify a converted JPG
On Windows, check Properties and Details. On macOS, open the file in Preview and use Show Inspector. In Photoshop, compare Image Size before and after: the resolution should change, while pixel width and height should remain the same.