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Image Tool
Image Size / DPI Checker
Check image dimensions, file size, format, aspect ratio, true DPI, and upload readiness.
About this tool
What is Image Size / DPI Checker?
Image Size and DPI Checker reports the key facts about a picture: its format, file size, dimensions, aspect ratio, megapixels and the DPI stored in the file. Use it before uploading to know whether an image meets a requirement, or to find out why a form keeps rejecting it.
Useful when you need to
- Check pixel dimensions and file size before a portal upload
- Find the true DPI of a scanned document or photo
- Verify an image is under a size limit in KB
- Understand why a form rejects a particular picture
How to use
How to use Image Size / DPI Checker
01 02 Set your size limit
Enter the maximum KB the form allows.
03 Read the report
Check format, size, dimensions, aspect ratio, megapixels and DPI, and whether it is under your limit.
04 Fix what fails
Use Image Compressor or Image Resizer if the picture is too large, then check again.
Tips
Get better results
- DPI stored in a file only matters for printing. Portals usually care about pixel dimensions and KB.
- Check the exact units a form uses. KB and MB are different by a factor of 1,000.
- Re-run the check after every edit to be sure.
FAQ
Frequently asked questions
What is DPI?
DPI is dots per inch, a print-resolution tag stored in some images. It does not change how an image looks on screen.
Why does it say DPI is missing?
Some images, such as screenshots, do not store a DPI value.
Does it modify my image?
No. It only reads the file.
Is my image uploaded?
See the Privacy Policy for how temporary files are handled.