Image Dimension Checker
Instantly check an image's width, height, aspect ratio and megapixels.
This tool runs entirely in your browser. Your files are never uploaded to a server.
Drop an image here or click to upload
Upload an image to instantly see its exact pixel width, height, aspect ratio and megapixel count. Useful for checking whether an image meets a platform's size requirements before uploading it elsewhere.
Frequently Asked Questions
- Is my image uploaded to a server?
- No, dimensions are read locally in your browser — your file never leaves your device.
- How is aspect ratio calculated?
- It's the width-to-height ratio simplified to its smallest whole-number form, e.g. 1920×1080 becomes 16:9.
- Which formats are supported?
- The file picker accepts JPG, PNG, WebP and GIF images. Successful reading also depends on whether your browser can decode the specific file.