Change image DPI
Printers and publishers often ask for 300 DPI files. Set the DPI tag of your JPEG or PNG in one click, without re-compressing, and see exactly how large it will print.
Only the DPI tag changes: no re-compression, no quality loss. Runs in your browser. Need more pixels for a bigger print? Use the upscaler first.
How to change image DPI
Open a JPEG or PNG
The current DPI is read from the file. Many phone photos say 72, or nothing at all.
Pick the DPI
300 is the usual print requirement. The print size in inches and cm updates as you choose.
Download
Only the DPI tag changes. Pixels and quality are untouched.
DPI does not change image quality
DPI (more precisely PPI, pixels per inch) is a tag that tells a printer how big to print the pixels you have. A 3000 × 2000px photo is 10 × 6.7 inches at 300 DPI and 41.7 × 27.8 inches at 72 DPI; it is the same file either way.
So if a print shop wants "300 DPI at 8 × 10 inches", you need 2400 × 3000 pixels. Changing the tag alone will not create those pixels. If you are short, use the upscaler first, then set 300 DPI here.
Need more control? Open the full image resizer, resize image to 20 kb or compress image to 100 kb.
Questions people ask
How do I change an image to 300 DPI?
Open it, choose 300, press Set and download. The pixels stay the same; only the print density tag changes.
Does changing DPI make the image better?
No. It only changes how large it prints. To make a sharper large print you need more pixels, which the image upscaler can add.
What DPI is best for printing?
300 DPI is the common standard for photos viewed at arm’s length. Posters seen from a distance look fine at 150 DPI.
Why does my phone photo say 72 DPI?
72 is a historical default from early Mac screens. It has no effect on screens and is just a label until you print.