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Convert DPI of an Image (72, 96, 150, 300)

Change the DPI saved in your picture to 300, 150, 72 or any whole number.

or drop an image anywhere on this page

JPG or PNG · up to 100 MB

  • Files never leave your device
  • Free, no sign-up
  • No watermark

How to use Convert DPI of an Image (72, 96, 150, 300)

  1. Choose a JPG or PNG picture, or drag it onto the page.
  2. Pick a DPI preset or type your own whole number.
  3. Check the print size shown for that DPI.
  4. Press Set DPI and download the picture.

About this tool

This tool rewrites only the density label inside the file. The picture data is copied byte for byte, so there is no re-compression and no loss of quality, and the pixel width and height stay the same. The new file is checked by reading the DPI back out before it is offered for download.

That also explains what the tool cannot do. Setting 300 DPI on a small picture does not make it a 300 DPI print-quality picture, because it still has the same number of pixels. What changes is the size at which programs and printers place it: more DPI means a smaller print from the same pixels, and less DPI means a larger one.

If a form needs a specific pixel size as well, resize the picture first with the Image Resizer and set the DPI afterwards, because resizing in other tools can reset the DPI.

Practical uses

  • Meeting a form or print shop that asks for a picture saved at 300 DPI.
  • Changing a 72 DPI screen picture to 150 or 300 before printing.
  • Making several pictures print at the same size in a layout program.

Tips for better results

  • Do your resizing first and set the DPI last.
  • For printing, check the print size shown. If it is too small, you need a picture with more pixels.
  • JPG and PNG only. Convert other formats first.

Frequently asked questions

Does this make my image sharper?

No. Only the number saved in the file changes. The pixels are identical, so sharpness is unchanged.

Will the file size change?

Only by a few bytes. For a PNG without a density chunk, a 21 byte chunk is added.

Is 300 DPI required?

It depends on who asks. Some print shops and forms require 300 DPI, but websites and screens ignore it.

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Privacy

Your image is processed in your browser on your own device. It is not uploaded to Paul Digital or any other server, and nothing is stored once you close the page.