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Change Image DPI to 300 (or Any Value)

Set the DPI of JPG and PNG files for printing, without changing the image.

or drag and drop here, or paste with Ctrl+V / ⌘V

Accepted: JPG, PNG

Convert on our server?

If you continue, the file is uploaded over an encrypted connection and converted on our server. You can keep using the site meanwhile. The original is deleted as soon as it is converted; the result is kept for 7 days so you can download it, and you can delete it at any time. Files are never shared or used for anything else.

Your images are processed in your browser and are not uploaded. Privacy details

How to use: DPI Changer

  1. 1 Enter the DPI you need, or pick a common value; 300 DPI is the usual print requirement.
  2. 2 Choose or drag in one or more JPG or PNG images.
  3. 3 Check the new DPI and the print size shown for each file.
  4. 4 Download the files one by one, or all at once as a ZIP file.

About this tool

DPI (dots per inch) is a number stored in an image file that tells printers and layout programs how large to print it. Print shops, publishers and some official forms ask for 300 DPI; screens ignore the value completely.

This tool rewrites only that number. The pixels are not resampled or re-compressed, so the image looks exactly the same and the file size barely changes. For JPG it updates the JFIF header and, when present, the EXIF resolution; for PNG it writes the standard pHYs value.

The print size shown for each file is its pixel width and height divided by the DPI. If a print is too small at 300 DPI, the image simply doesn't have enough pixels for that size; raising the DPI can't add detail. Files are processed in your browser and are not uploaded.

Frequently asked questions

Does changing the DPI change the quality?

No. The pixels stay exactly the same; only the resolution value stored in the file changes. On screen, the image looks identical.

Why does a website or print shop want 300 DPI?

300 DPI is the usual resolution for sharp prints viewed up close. Many upload forms simply check this value, so setting it lets the file pass the check.

How big will my print be?

Width in pixels ÷ DPI = width in inches (× 2.54 for centimetres). A 3000 × 2000 pixel photo at 300 DPI prints at 10 × 6.7 inches, about 25.4 × 16.9 cm. The tool shows this for every file.

Which formats are supported?

JPG and PNG, which store DPI in a standard way. To set the DPI of a WebP, HEIC or other image, convert it to JPG or PNG first.

Are my images uploaded?

No. The value is changed by your own browser and the files never leave your device.

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