Image Size Checker
Drop in an image to instantly see its dimensions, megapixels, aspect ratio, and file size — read in your browser, never uploaded.
データ収集なし
データベースもアカウントもありません。ファイルを見ることはできません。
超高速
ブラウザネイティブ処理 — アップロードなし、待ち時間なし。
100%無料
制限なし、透かしなし、隠れた費用なし。
アカウント不要
サインイン？不要です。ツールを開くだけで使えます。
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.