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Select the image you need to check.
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Image Dimension Checker
Find an image’s pixel width, height, file size and reported format without uploading it to a server.
No photo uploadsNo watermarksWorks in your browser
Know your image sizeDrop your image here
or choose a file from your device
JPGPNGWebP
Maximum 20 MB per image
Read image properties without exporting a new file.
Processed on your device
Your file is ready
Your photos stay in this browser. No account needed.
Some images contain rotation metadata. The browser may show dimensions for the orientation it decodes, which can differ from a raw camera-data viewer.
Quick steps
How to check image dimensions
Read its details
Click Read image details to see the width, height, size and available format information.
Decide what to change
Use a resizer for pixels or a compressor for KB, if the image needs either.
A few useful details
Check what you already have before editing
Before changing a photo, check whether it actually needs changing. This page reads its width and height in pixels, file size, filename and the format information supplied by your browser.
For example, a picture can already be 600 × 600 px and still be too large in KB for a form. In that case, compress it rather than resizing it again. If the shape or pixels are wrong, crop or resize instead.
Nothing is exported from this page. It is a quick way to see the numbers and decide what to do next. Camera rotation metadata can affect the orientation your browser displays.
A couple of things to check
Some images contain rotation metadata. The browser may show dimensions for the orientation it decodes, which can differ from a raw camera-data viewer.
A filename ending in .jpg is not proof that a file is JPEG. The reported type comes from the browser and can be missing for some files.
Read the numbers before deciding what to change
Width and height describe the frame
The width is the horizontal pixel count and the height is the vertical count in the decoded image. A wider-than-tall result is landscape; a taller-than-wide result is portrait. A square has equal numbers. These values do not, by themselves, say whether the subject is framed correctly.
File size is a different measurement
KB and MB describe how much storage the file uses. Two images with the same dimensions can have very different sizes because of content, format and compression. That is why a form can accept one photo and reject another even when their pixel dimensions match.
A screenshot changes what you are checking
If you select a screenshot of a picture, the numbers belong to the screenshot—including any added border or interface—not necessarily to the original photo. Use the original file when you need to verify its properties for an upload or publishing workflow.
Choose the next tool from the result
Correct pixels but too many KB calls for compression. Wrong dimensions calls for resizing or cropping. An unsupported extension calls for conversion. This checker does not alter the file, so you can inspect it first without committing to an unnecessary edit.
Visual examples
Read image dimensions at a glance
Sample measurements. The image is unchanged between input and inspection.
Input![Measure a landscape image — Input]()
Measured![Measure a landscape image — Measured]()
EXAMPLE 01
Measure a landscape image
Width comes first: 800 × 450 means 800 pixels across and 450 pixels high.
Sample measurements. The image is unchanged between input and inspection.
Input![Recognise a square image — Input]()
Measured![Recognise a square image — Measured]()
EXAMPLE 02
Recognise a square image
A 720 × 720 image has equal sides. This checker reads dimensions; it does not resize the original.
Sample measurements. The image is unchanged between input and inspection.
Input![Check a portrait image — Input]()
Measured![Check a portrait image — Measured]()
EXAMPLE 03
Check a portrait image
A 480 × 600 image is taller than it is wide. Compare both numbers with the destination requirements.
Sample measurements. The image is unchanged between input and inspection.
Frequently asked questions
Does checking alter the image?
No. The tool reads the selected file and shows its details. It does not create a replacement.
Why does the format say Unknown?
Some browsers do not supply a file type for every local image. A filename extension alone is not a reliable check of the contents.
Can it tell me the print size?
It shows pixels. The physical print size also depends on the resolution chosen in your printing software.
Can this confirm the contents are appropriate for a form?
No. It reports file and image properties. You still need to check the required framing, subject and any instructions from the destination.
Why do two viewers sometimes show swapped dimensions?
Some images carry rotation metadata. Viewers can handle that orientation information differently, so compare the picture as displayed as well as the reported numbers.
Keep working
Tools you might need next
Image Resizer
Set pixel dimensions while keeping proportions.
Open tool ↗Image Aspect Ratio Calculator
Calculate image shape and matching dimensions.
Open tool ↗Image DPI Converter
Set JPEG resolution metadata for print workflows.
Open tool ↗Crop Image
Keep the part you need, with a live crop preview.
Open tool ↗