Check Image DPI & Resolution
See the DPI stored in any JPG or PNG, its pixel resolution, and the largest size it prints sharply at 300 DPI. Nothing is uploaded.
Updated September 2026 · Free · Works entirely in your browser
DPI vs resolution in one paragraph
Resolution is how many pixels an image has. DPI is an instruction stored alongside them that says how many of those pixels to squeeze into each printed inch. Change the DPI and the pixels do not change — only the printed size does. That is why this checker shows two answers: the DPI written in the file, and the print sizes your pixel count can honestly support.
How many pixels you need at 300 DPI
| Pixels at 300 DPI | Pixels at 150 DPI | |
|---|---|---|
| 4 × 6 in | 1200 × 1800 | 600 × 900 |
| 5 × 7 in | 1500 × 2100 | 750 × 1050 |
| 8 × 10 in | 2400 × 3000 | 1200 × 1500 |
| US Letter 8.5 × 11 in | 2550 × 3300 | 1275 × 1650 |
| A4 210 × 297 mm | 2480 × 3508 | 1240 × 1754 |
| 11 × 14 in | 3300 × 4200 | 1650 × 2100 |
Where the DPI number lives
- JPEG: the JFIF header (density) and, when present, the EXIF XResolution tag. Photoshop and most editors read EXIF first.
- PNG: the optional pHYs chunk, stored in pixels per metre (11811 ppm = 300 DPI).
- WebP, screenshots, web downloads: usually none at all.
For the theory, see DPI and resolution explained; to plan a print from a target size, use the DPI & print size calculator.
Gear we recommend for this workflow
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Frequently Asked Questions
Everything you need to know about image conversion.