Convert an image to 300 DPI in three steps
- 300 is already selected. Add your JPG or PNG images.
- Check the print size shown under each file: that is how big it will print at 300 DPI.
- Download the 300 DPI copies and upload them to the form, print shop or publisher.
Who asks for 300 DPI?
- Print shops and photo labs: 300 DPI is the standard for sharp photos and flyers.
- Online application forms: some exam, visa and job portals check the DPI of photos and signatures.
- Publishers and print-on-demand (books, KDP covers, merchandise) often require 300 DPI artwork.
Pixels you need for common sizes at 300 DPI
| Print size | Pixels needed |
|---|---|
| 2 × 2 in (passport, US) | 600 × 600 |
| 3.5 × 4.5 cm (passport) | 413 × 531 |
| 4 × 6 in | 1200 × 1800 |
| 5 × 7 in | 1500 × 2100 |
| 8 × 10 in | 2400 × 3000 |
| A4 (21 × 29.7 cm) | 2480 × 3508 |
If your image has fewer pixels than this, it will still be 300 DPI but print smaller. To change the DPI to another value, use the change image DPI tool.
Frequently asked questions
Does changing the DPI reduce quality?
No. This tool changes only the resolution setting stored in the file header. The pixels are not decoded or re-compressed, so the picture is bit-for-bit the same.
Why does a form or print shop ask for 300 DPI?
DPI tells printers how big to print the image: at 300 DPI a 1800 × 1200 px photo prints at 6 × 4 in. Many forms and print services check this setting and reject 72 or 96 DPI files even when the pixels are fine.
Will 300 DPI make a blurry photo sharp?
No. DPI doesn’t add detail; it only sets the print size. For a sharp print you need enough pixels: about 300 for every inch of print. The tool shows the size each image will print at.
Which formats are supported?
JPG/JPEG and PNG are edited losslessly, including camera and phone photos with EXIF data (both places where JPEG stores DPI are updated). Other formats such as WebP are saved as PNG first.
Are my images uploaded?
No. The files are edited in your browser, so they never leave your device.
Last updated 2026-10-24.