Image Dimensions Checker
Check width, height, DPI, aspect ratio, file size, and color depth of any image.
What is Image Dimensions Checker?
Knowing the exact dimensions and properties of an image is essential for web design, print preparation, and content creation. Our dimensions checker reads the image and displays its width and height in pixels, aspect ratio in simplified form, total megapixels, file size, format, color depth, and orientation (landscape, portrait, or square). This information helps you determine if an image meets the requirements for a specific platform, print size, or layout before you invest time in editing or uploading.
How to Use
- 1Upload an image by dragging it onto the drop zone.
- 2The tool automatically reads and displays all dimension information.
- 3Review the table showing width, height, aspect ratio, megapixels, and more.
Why Use This Tool
- ✓Check platform requirements — verify your image meets dimension requirements before uploading.
- ✓Plan layouts — know exact dimensions for web design and print layouts.
- ✓Understand image properties — learn the aspect ratio, megapixels, and orientation of any image.
Frequently Asked Questions
What is aspect ratio and why does it matter?⌄
Aspect ratio is the proportional relationship between width and height, expressed as a ratio like 16:9 or 4:3. It determines the shape of the image. Different platforms require specific aspect ratios — for example, Instagram posts use 1:1 (square), YouTube thumbnails use 16:9, and Instagram Stories use 9:16. Knowing your image aspect ratio helps you crop or resize correctly.
What is the difference between dimensions and resolution?⌄
Dimensions are the actual pixel count (e.g., 1920x1080), while resolution typically refers to DPI (dots per inch) for print. An image that is 1920x1080 pixels at 300 DPI would print at 6.4 x 3.6 inches. For screen display, only pixel dimensions matter; DPI is relevant only for print.
Can this tool check GIF or WebP dimensions?⌄
Yes. The tool uses the browser's built-in image decoder, which supports PNG, JPEG, WebP, GIF, BMP, and SVG. All formats are decoded and their dimensions displayed. Animated GIFs show the dimensions of the first frame.
Why does my image show a different size than what my file manager displays?⌄
Some file managers display the file size in different units (binary KB vs decimal KB) or round differently. Our tool displays the exact file size in standard binary units (1 KB = 1024 bytes). Minor discrepancies are due to rounding, not actual differences.