Image Size Checker
Drop in an image to instantly see its dimensions, megapixels, aspect ratio, and file size — read in your browser, never uploaded.
不收集数据
没有数据库，没有账户。我们无法查看您的文件。
极速
浏览器原生处理 — 无需上传，无需等待。
100%免费
无限制，无水印，无隐藏费用。
无需账户
无需登录。打开工具即可使用。
Reading image dimensions
What you'll see
The checker reports the exact pixel width and height, the total megapixels, the simplified aspect ratio (like 16:9), the file size, and the file type. That's everything you need to know whether an image meets a platform's requirements.
Pixels vs. file size
Dimensions (pixels) decide how large an image appears; file size (KB/MB) decides how fast it loads and whether it fits an upload limit. A small-pixel image can still be a large file if it's uncompressed — use the compressor to shrink the file without changing dimensions.
Frequently asked questions
Does it upload my image?
No. The image is read locally in your browser to measure it.
What's the aspect ratio shown?
The width:height ratio reduced to its simplest whole-number form, e.g. 1920×1080 shows 16:9.
Which formats work?
Any image your browser can open — PNG, JPG, WebP, GIF, and more.
How do I change the size?
Use the Resizer to change dimensions or the Compressor to reduce file size.