How to use it
- Choose your photo or drop it into the box.
- Type the DPI you need (300 is filled in) and choose JPG or PNG.
- Download the image. The pixels stay the same; only the DPI value changes.
What DPI really means
DPI (dots per inch) tells a printer how many pixels of your picture to place in one inch of paper. The picture itself is not resampled, so file size and sharpness on screen do not change.
Forms and print shops sometimes ask for a minimum such as 300 dpi. This tool writes that value into the file so it is read correctly. If a form also needs a pixel size, use the resize tool first.
Example: a 1200 × 1800 pixel photo at 300 dpi prints 4 × 6 inches. At 150 dpi the same photo prints 8 × 12 inches.
Questions
Does changing DPI change the picture?
No. DPI is only a label that tells printers how big to print the pixels. The width and height in pixels stay exactly the same, so the picture looks identical on screen.
Does a higher DPI make the photo sharper?
No. Sharpness depends on the pixel size. To get more detail you need a photo with more pixels. DPI only changes the print size: 3000 pixels at 300 dpi prints 10 inches wide, at 150 dpi it prints 20 inches wide.
What DPI should I use?
Use 300 dpi for printing photos and for most forms that ask for 300 dpi, 72 dpi for web and screens. Some portals ask for 200 or 600 dpi, and you can type any value.
Is my photo uploaded?
No. The change happens in your browser and your picture never leaves your device.