Change Image DPI
Free tool to change image DPI — set 72, 150, 300 DPI or any value for printing, with optional resampling. Runs in your browser with no signup.
About the Change Image DPI
DPI (dots per inch) tells printers and design software how large an image should appear on paper. This free tool rewrites the DPI metadata inside your JPG or PNG so a photo prints at the exact physical size you need — for example 300 DPI for high-quality prints or 150 DPI for drafts — without changing the pixels.
You can optionally resample the image so its pixel dimensions match a target print size at the chosen DPI. Everything happens in your browser, so your picture is never uploaded, and you can download the updated file instantly.
How to Use the Change Image DPI
- 1Upload a JPG or PNG image, or drag it onto the drop zone.
- 2Enter the target DPI, such as 300 for print-quality output.
- 3Optionally enable resampling to change the pixel dimensions too.
- 4Download the image with updated DPI, or reset to start again.
Frequently Asked Questions
What DPI should I use for printing?
300 DPI is the standard for sharp photo prints and professional documents. 150 DPI is fine for large posters viewed from a distance, while 72 DPI is typical for on-screen use.
Does changing DPI change how the image looks on screen?
No. On a screen images are measured in pixels, so DPI only affects the printed size. Changing DPI without resampling keeps every pixel exactly as it was.
What is resampling?
Resampling actually adds or removes pixels so the image reaches a specific print size at your chosen DPI. It changes file dimensions, whereas a pure DPI change only edits metadata.
Are my images uploaded?
No. The DPI metadata is rewritten in your browser and the file stays on your device the whole time.