How we know →

This project is still in development. Contributions are welcome: see the project on GitHub and the contributing guide.

Image size checker GitHub

Image size checker

See the real format, dimensions, file size, aspect ratio and DPI of any image.

Files

Preview

Add a file to see a preview.

How it works
  1. Add one or more images. The details appear straight away.
  2. Read the format, size in pixels, file size, aspect ratio and DPI.
  3. Remove a file with its X button, or remove them all.

FAQ
How is the format found?
From the contents of the file, not from its name. A file called photo.jpg that is really a PNG is shown as PNG.
What is the nearest common ratio?
The well-known shape closest to your picture, such as 16:9 or 4:3, and how far off it is. A picture that is exactly 16:9 says so.
Why is there no DPI?
DPI is optional and many files do not store it. Websites and phones usually leave it out. It only matters for printing.
Are photos shown the right way up?
Yes. The width and height are those of the photo as it is displayed, after its stored orientation is applied.
Is anything uploaded?
No. Only the first bytes of each file are read, in your browser.