Change Image DPI for Printing

About Change Image DPI

Change image DPI when a print shop, a journal or an application form asks for 300 DPI and your file says 72, and see at once how large it will print. With Only the DPI (pixels stay the same), DPI is just a label in the file that tells programs how large to print it: choose 72, 96, 150, 300, 350 or 600, the new value is written in, and the result tells you the print size, for example 10.2 × 6.8 cm at 300 DPI. For JPG and PNG only the header is edited, so the image data stays byte for byte the same and nothing is recompressed. JPGs get both the JFIF density and the EXIF resolution updated, and TIFFs are saved again losslessly.

When the print size itself matters, for a 10 × 15 cm print, an A4 poster or a picture for a frame, choose Resize for a print size and enter Print width, Print height or both in centimeters. The picture is resampled to that size at your DPI, so 10 × 15 cm at 300 DPI means 1181 × 1772 pixels, and the result tells you the pixels and the print size. If both are set and the picture's shape differs, Fit inside keeps it whole within that size, Fill and crop fills it and trims the edges, and Stretch fills it by distorting. Print size is always pixels divided by DPI, so a photo 3000 pixels wide prints 10 inches, about 25 cm, wide at 300 DPI.

How to use Change Image DPI

1. 1
   Add your images

   Choose or drop JPG, PNG or TIFF files. A whole batch gets the same settings.

2. 2
   Choose DPI and mode

   Pick the New DPI, and under Change, Only the DPI (pixels stay the same) or Resize for a print size.

3. 3
   Enter the print size

   For a print size, type Print width, Print height or both in cm, and choose what happens If both are set.

4. 4
   Change and download

   Click Change Image DPI, check the print size in the result, and save each file or all of them as a ZIP. Names get the value, for example photo_300dpi.jpg.

Why use Cubfile for this

• Pixels untouched

  With Only the DPI, JPG and PNG image data stays exactly as it was, and both JPG resolution headers are updated.

• Resize for a print size

  Enter centimeters and get the exact pixels for that size at your DPI, fitted, filled or stretched.

• Print size in the result

  You see at once how large the picture prints, in centimeters, before you send it to the print shop.

• Common values, whole batches

  72 and 96 for screens, 150 for everyday prints, 300 and 350 for print shops and 600 for line art, for a whole folder at once.