Change Image DPI
Set the DPI of a JPG or PNG, such as 300 DPI for printing or forms, without changing its pixels.
Change Image DPI sets the resolution value stored in a JPG or PNG file, such as 300 DPI for printing or the value an application form asks for. The pixels are not touched, so quality and file size stay the same: only the print size changes, and the tool shows it in centimetres and inches. It updates both places a JPG can store DPI, so Windows, Mac and photo apps all read the new value. Everything runs in your browser, so the image is never uploaded.
How to use Change Image DPI
- 1
Add your image
Drop or choose a JPG or PNG. WebP and HEIC are converted to JPG first.
- 2
Choose the DPI
Pick 72, 96, 150, 200, 300 or 600, or type any value.
- 3
Check the print size
See how large the image will print at that DPI.
- 4
Download
Save the image with the new DPI.
What it does
- No quality loss
- Only the DPI value is changed; the image data is untouched.
- Read everywhere
- Both the JFIF and EXIF resolution of a JPG are updated, so every app shows the same DPI.
- Print size shown
- See the print size in centimetres and inches before you download.
- Private
- The image is changed in your browser and never uploaded.
Questions
Does changing the DPI improve quality?
No. DPI is only a label telling printers how large to print. To get more detail you need more pixels, which no tool can truly create.
A form needs 200 DPI and a size in centimetres. What do I do?
Set the DPI here, then check the print size. If it doesn't match, resize the image to the pixel size the form needs: centimetres ÷ 2.54 × DPI. For example 3.5 cm at 200 DPI is 276 pixels.
Why does my image say “Not set”?
Many phone photos and screenshots don't store a DPI. Most apps then assume 72 or 96. Setting a value here fixes that.
Is my image uploaded?
No. The change happens in your browser on your device.