DPI Checker

Check the resolution of your image or PDF and see whether it is good enough to print.

Your files stay in your browser - no upload to our server.

Drop image or PDF here or select file

JPG, PNG, WebP or PDF - max 250 MB

About this tool

Is the resolution good enough to print?

DPI means dots per inch (2.54 cm): the more dots per centimeter of paper, the sharper the print. How many there are depends on the print size, so the same photo looks sharp on a postcard and pixelated on a poster. For an image, the tool shows how large you can print it. For a PDF, it lists every photo with its resolution, weakest first.

How to use

How it works

1

Choose a file

Drag an image (JPG, PNG, WebP) or a PDF into the upload area or select it via the file dialog. The file stays on your device.

2

Read the rating

Every resolution gets a rating: 300 dpi and up is very good, 150 and up good, 100 and up borderline, below that pixelated.

3

Spot the weak ones

For a PDF, a small detail shows which image is meant and on which page it sits. For an image, you see up to which format it holds up.

FAQ

Questions about resolution

Not necessarily. The dpi value in a file’s header (often 72 or 96) is just a note and doesn’t tell you how sharp the print will be. What matters is the pixel count and the size the image is printed at. That’s why this tool ignores the value and works out the real resolution from the two.
As a rule of thumb, 300 dpi is very good, 150 dpi is usually enough, and below 100 dpi the print looks visibly pixelated. Large prints like posters are viewed from further away, so lower dpi is less noticeable there. For an image, the tool shows the resolution at every format from A6 to A0, so you can see right away how it fares at A4 or A2.
No. The check runs entirely in your browser. Your file never leaves your computer.
Text, lines and vector graphics, such as charts that Word or PowerPoint exports as vectors, aren’t made of pixels. They have no fixed resolution and stay sharp at any size. The tool therefore lists only photos and other raster images. A chart that was inserted as a picture will show up.
Identical images at the same size, for example a logo on every page, are grouped into one row, such as “Pages 1-5”. Icons under 1 cm are not listed individually, only counted.