Image DPI / Print Requirement Fixer
Check your image DPI, change it to 72, 150, 300 or a custom value, and verify whether it has enough pixels for your required print size.
What DPI means
Pixel dimensions describe how many samples an image contains. DPI metadata describes how many pixels should be printed per inch. At a given density, print width in inches is pixel width divided by DPI; centimeter values use 2.54 centimeters per inch.
Does changing DPI improve quality?
No. Changing DPI metadata alone does not create new pixels or image detail. It changes the physical print size associated with the same pixel dimensions.
How many pixels do I need for 300 DPI?
Multiply the requested print width and height in inches by the target DPI. A 6 × 4 inch print at 300 DPI needs 1800 × 1200 pixels. The checker compares this requirement with your image and flags aspect ratios that may need cropping.
Common DPI values
72 and 96 are commonly associated with screens or legacy metadata. 150 is used for moderate print density, while 300 is a common high-quality print target. Some specialized workflows use 600 DPI. Follow the requirements from your printer or form provider.
Frequently asked questions
How do I change an image to 300 DPI?
Choose a JPEG or PNG, select the 300 DPI preset, and update its resolution metadata. SimpleFileFix verifies the saved value.
Does 300 DPI mean higher resolution?
No. DPI describes print density. Changing it does not add pixels or image detail.
Will changing DPI resize my image?
No. SimpleFileFix changes metadata only. Pixel dimensions remain the same and physical print size changes.
How many pixels do I need for a 4 × 6 photo at 300 DPI?
A 4 × 6 inch print at 300 DPI needs 1200 × 1800 pixels, before considering cropping or aspect ratio.
Can I change DPI without changing image quality?
Yes. JPEG JFIF density or PNG pHYs metadata is updated without decoding or recompressing the image pixels.