Check Image Dimensions
Get the exact pixel size of any image along with its aspect ratio, megapixels and how large it would print, for one file or a whole folder at once.
- On-device
- No sign-up
- Batch
- Free, no watermark
Drop images on the plate
or paste with Ctrl/⌘ V
Processed on this device
How it works
- 01Drop, choose or paste the images you want to check.
- 02Read the dimensions report for each file.
- 03Copy the width, height or ratio you need.
Why use this tool
More than width and height
See aspect ratio, megapixels, landscape or portrait orientation and the DPI value stored in the file, if there is one.
Print size included
Each image shows how large it prints at 300 DPI, so you know whether it is sharp enough for a photo print.
Check many at once
Add up to 200 images and compare their sizes side by side, without opening each one in an editor.
Supported formats
Use cases
Meeting upload requirements
A visa or job portal asks for a photo of at least 600×600 pixels. Check yours before you start the form instead of after it is rejected.
Planning a photo print
See whether a phone photo has enough pixels for a sharp 8×10 inch print at 300 DPI, or whether a smaller size is wiser.
Auditing site images
Drop a folder of hero images and spot the ones that are far larger than the 1920-pixel width your layout actually displays.
Technical details
Pixel dimensions are what matter on screens and for most upload forms. The DPI value is only a note stored in the file that tells printing software how many pixels to place per inch; changing it does not add detail. That is why the report shows stored DPI separately from print size at 300 DPI, which is calculated from the pixels alone: a 3000×2000 photo prints at 10×6.67 inches at 300 DPI.
Megapixels are width times height divided by one million, so a 4032×3024 phone photo is about 12.2 MP. Orientation is reported as landscape, portrait or square, which helps when a form insists on a portrait photo. If an image is too large or the wrong shape, you can fix it with Resize to Exact Size. The guide on image resolution and DPI explains the difference between pixels and DPI in more depth.
Your files stay with you
This tool runs entirely inside your browser using Web Workers and WebAssembly. Your images are never uploaded, never stored on a server and never used to train AI. Close the tab and they’re gone. Learn more
Frequently asked questions
How do I find the size of an image in pixels?
Add the image to the checker and the report shows its width and height in pixels straight away, along with the aspect ratio and megapixels. You can check many images at once, which is quicker than opening each file’s properties one by one.
What does 72 DPI or 300 DPI mean for my image?
DPI is a print instruction stored in the file. It does not change the pixels or how the image looks on a screen. What matters for print quality is the pixel count divided by the print size. The report calculates the print size at 300 DPI, a common standard for sharp photo prints.
Why does the checker show no DPI for my image?
Many images, including most screenshots and web downloads, simply don’t store a DPI value. That is normal and doesn’t affect quality. The print size at 300 DPI is still shown because it is calculated from the pixel dimensions, not from the stored value.
How is the aspect ratio calculated?
The width and height are reduced to their simplest ratio, so 1920×1080 shows as 16:9 and 1080×1350 as 4:5. Sizes that don’t reduce to a common ratio are still shown accurately, so you can compare them with the ratio an upload form or platform expects.
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