Change DPI of Image
Set the DPI of your JPG or PNG to 300 for print, or any other value. See the current DPI and the print size, and keep every pixel intact.
How to use Change DPI of Image
- 1
Add images
Drop one or many JPG or PNG files. The current DPI of each file is shown.
- 2
Choose the new DPI
Type a value or pick 72, 96, 150, 300 or 600 DPI.
- 3
Pick a method and download
Change the metadata only (no quality loss) or resample to keep the print size, then download one file or a ZIP.
What is DPI?
DPI (dots per inch) tells printers and programs such as Word, InDesign and Photoshop how large an image should be printed. A photo of 3000 × 2000 pixels prints at 10 × 6.7 inches at 300 DPI, or at 41.7 × 27.8 inches at 72 DPI. The pixels are the same; only the print size changes.
Two ways to change DPI
- Metadata only (recommended): changes the DPI value stored in the file. The image is not re-compressed, so there is zero quality loss. Use this when a print shop, publisher or form asks for a 300 DPI file.
- Resample (keep print size): keeps the physical size and changes the pixel count. Going from 72 to 300 DPI makes the image about 4× larger in each direction. This adds pixels, not detail.
Check the current DPI
Each file shows the DPI stored in its JFIF or EXIF data (JPEG) or pHYs chunk (PNG). Screenshots and images saved by browsers often have no DPI set; most programs then assume 72 or 96 DPI.
Tips
- Printers care about pixels: for a sharp 300 DPI print at 10 × 15 cm you need at least 1181 × 1772 pixels.
- To resize to an exact size in cm, mm or inches, use Resize Image in cm.
- To read all metadata of a photo, use the EXIF Viewer.