The short answer
Why use PPI Checker?
File details explain why a photo prints badly, turns sideways, or reveals more than you meant. Checking the file first saves guesswork.
The tool looks for the resolution value in three places, in this order: the EXIF tags, the JFIF header of a JPEG, and the pHYs chunk of a PNG. When it finds one, it shows the value and the print size it implies. Values stored per centimeter are converted to per inch.
If none of those places has a value, you get the print size at 300 and at 150 PPI instead, along with the pixel dimensions. That is the normal result for screenshots and pictures saved from websites, and it says nothing bad about quality. Pixels decide print sharpness: a 3000-pixel-wide photo prints 10 inches wide at 300 PPI whatever number the file stores.
PPI Checker and DPI Checker read the same tag and give the same answer. To work out sizes for a print order, use Print Size.
Where PPI Checker fits
Print lab orders
Check the stored PPI before a photo lab asks for 300.
Publisher specs
Confirm the resolution value on a figure for a journal or magazine.
Client logos
See whether a logo a client sent carries any resolution value at all.
Start to finish
How to use PPI Checker
- 01Tap Choose image and pick the JPG or PNG you plan to print.
- 02Tap Apply changes. The tool reads the PPI from the EXIF tags, the JFIF header, or the PNG pHYs chunk.
- 03Read the value and print size, then tap Download result to keep the report as a .txt file.
What to expect from PPI Checker
| Check | What it means here |
|---|---|
| Supported input | JPEG, PNG, WebP, GIF, BMP, SVG and browser-supported AVIF images |
| Main controls | Choose a file; the results are read-only |
| Output | Dimensions, metadata, colors, or an extracted preview, depending on the tool |
| Working limit | 50 MB and 50 megapixels per image |
PPI Checker tips
- No tag is normal for screenshots; the report then lists print sizes at 300 and 150 PPI.
- Changing the stored number alone never adds sharpness; the pixel count decides that.
- Values stored per centimeter are converted to per inch for you.
- Width in pixels divided by 300 gives the print width in inches at photo quality.
PPI Checker FAQ
Something missing? Ask us.
Is PPI the same as DPI?
How do I work out print size from PPI?
Does PPI Checker upload my file?
Is PPI Checker free to use?
Why did PPI Checker fail or look wrong?
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