Drop an image to see the DPI stored in the file, its pixel size, and how large it prints sharp.
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Drop a PNG, JPG or WebP, or click to browse
checked in your browser — nothing is uploaded
JPG, PNG or WebP — it is read in your browser, never uploaded.
See the DPI the file stores and where it was found, next to the pixel size.
Compare the print size at the stored DPI, at 300 and at 150 DPI. Too small? Increase the DPI or resize from there.
How to check the DPI of an image
Pixels = inches × DPI.
| Print size | @ 150 DPI | @ 300 DPI |
|---|---|---|
| 4 × 6 in | 600 × 900 | 1200 × 1800 |
| 5 × 7 in | 750 × 1050 | 1500 × 2100 |
| 8 × 10 in | 1200 × 1500 | 2400 × 3000 |
| A4 · 8.27 × 11.69 in | 1240 × 1754 | 2480 × 3508 |
| 11 × 14 in | 1650 × 2100 | 3300 × 4200 |
| 16 × 20 in | 2400 × 3000 | 4800 × 6000 |
| 18 × 24 in | 2700 × 3600 | 5400 × 7200 |
Drop it into the checker above. It reads the DPI from the PNG pHYs chunk or the JPEG JFIF/EXIF header. On Windows you can also open Properties → Details; on a Mac, open the image in Preview and choose Tools → Show Inspector.
The file does not store one. Most software then assumes 72 or 96 DPI. The number that matters for printing is the pixel count, which the checker always shows.
Not by itself. A 72 DPI tag on a 3600-pixel-wide image can still print 12 inches wide at 300 DPI once the tag is changed. Trouble starts only when there are too few pixels for the size you want.
Multiply each side in inches by 300. A 4 × 6 in photo needs 1200 × 1800 pixels, 8 × 10 in needs 2400 × 3000, and A4 needs 2480 × 3508.
PPI counts the pixels per inch in the image; DPI counts the ink dots a printer lays down. Files store the value as DPI, and for print-size math the two are used the same way.
No. Everything happens in your browser, and the image never leaves your device.
