Image Size Checker
Check an image’s dimensions, aspect ratio, orientation and megapixels — in your browser.
Image Size Checker is a browser-based image tool on ImgToolsBase. Check an image’s dimensions, aspect ratio, orientation and megapixels — in your browser. To use it, upload or drop your image and view the result directly in your browser — no signup and nothing to install.
How this tool works
What it does
Reports dimensions, simplified aspect ratio, orientation, megapixels and file size.
Not metadata
Use the Metadata Viewer for EXIF, camera and GPS data.
Decode needed
Requires a browser-decodable image to read dimensions.
Privacy
The image is measured in your browser; nothing is uploaded.
Image Size Checker in your browser
Image Size Checker reports an image's pixel dimensions, simplified aspect ratio, orientation, total pixel count, megapixels and file size. It focuses on size and dimensions only — it does not inspect EXIF or other metadata.
Upload any image and the tool decodes it to read its width and height, derives the lowest-terms aspect ratio and orientation, and reports megapixels and the stored file size.
The image is measured in your browser and never uploaded, and the figures can be downloaded as a text report.
How to use Image Size Checker
- Upload an image into Image Size Checker by clicking, pressing Enter, or dragging it in.
- Click Process to decode the image and read its dimensions.
- Review the dimensions, aspect ratio, orientation and megapixels.
- Download the size summary as a text file.
Why use Image Size Checker
Reports width, height, pixel count and megapixels at a glance.
Shows the simplified ratio and whether it is landscape, portrait or square.
Size and dimensions only — no metadata inspection.
Sizing runs locally, so the file is not sent to imgtoolsbase.
Common uses for Image Size Checker
Confirm an image's exact pixel size before using it.
See whether dimensions are 16:9, 4:3, 1:1 and so on.
Check pixel size and file size against a spec.
Sort images by orientation or megapixels.
Frequently asked questions
What does Image Size Checker report?
Pixel dimensions, the simplified aspect ratio, orientation (landscape, portrait or square), total pixel count, megapixels and the file size. It is focused on size, not metadata.
Does Image Size Checker read EXIF or camera metadata?
No. For EXIF, camera and GPS information use the Metadata Viewer. This tool deliberately reports dimensions and size only.
How does Image Size Checker work out the aspect ratio?
It divides the width and height by their greatest common divisor to express the ratio in lowest terms, for example 1920 × 1080 as 16:9.
What if my file will not decode in Image Size Checker?
If the browser cannot decode the file as an image, its dimensions cannot be read; try a standard format such as JPG, PNG or WebP.
Is my image uploaded to check its size?
No. The image is decoded and measured in your browser; nothing is sent to a server.
Related image tools
Tools that pair well with Image Size Checker.