Does Changing DPI Change Image Quality?
Changing a file from 96 DPI to 300 DPI does not magically add image detail. DPI mainly describes how existing pixels should map to physical print size.
Open the toolChange Images to 300 DPI →Pixels and DPI are different things
Pixel dimensions describe how much raster information an image contains. DPI is metadata that relates those pixels to a physical print size. A 1200 × 1200 image still contains 1.44 million pixels whether its metadata says 72 DPI or 300 DPI.
When changing DPI is useful
Some print, publishing, school or application workflows inspect the DPI metadata and explicitly require 300 DPI. In that case changing the metadata can satisfy the requirement without resampling the image.
- Print handoff requirements
- Submission systems that inspect DPI
- Consistent metadata across a batch
When you need more pixels instead
If the image must print larger while preserving detail, simply changing DPI is not enough. You need sufficient pixel dimensions for the intended physical size.