PrivTab

画像サイズの確認

複数の画像のサイズを確認

ブラウザで動作 · アップロード不要

このツールとページ内の説明は、現在は英語のみです。動作は同じで、すべてブラウザ内で実行されます。

Drag & drop images or a folder here

or

JPG, PNG, WebP, AVIF, HEIC, GIF, TIFF, BMP, SVG, any number. Only the start of each file is read.

Your files stay on your device. Nothing is uploaded.

  • 何も端末から出ません
  • サーバーによるサイズ制限なし
  • 登録不要・透かしなし
  • 無料

How to check image dimensions

  1. Choose images or a folder, or drag them in.
  2. Optionally set a minimum width and height to flag images that are too small.
  3. Sort the table by any column, and download it as CSV or JSON.

What you see for each image

  • Width × height in pixels, as the image is displayed (phone photos stored sideways are shown upright).
  • Megapixels, and the aspect ratio: 3:2, 4:3, 16:9 or the nearest common ratio.
  • DPI, when the file stores one (JPEG and PNG). DPI only matters for printing; it doesn't change the pixels.
  • The real format, whatever the file name says, and the file size.

Fast, even for big folders

Only the first 64 KB of each file are read: sizes are stored at the start of image files, so hundreds of photos are checked in seconds without opening them. Images whose size isn't in their header are decoded by your browser instead. JPG, PNG, WebP, AVIF, HEIC, GIF, TIFF, BMP, SVG and PSD are supported.

Your images stay on your device

Everything happens in your browser. Your images are never uploaded, and this site's security policy blocks the page from sending files anywhere.

よくある質問

Why does my photo show a different size than my camera says?

Phones often store photos sideways and add a note to rotate them. This tool shows the size as the photo is displayed, so a 4032 × 3024 photo held upright is listed as 3024 × 4032.

What size do I need for printing?

For a sharp print, about 300 pixels per inch: a 6 × 4 in print needs 1800 × 1200 pixels. The DPI & Print Size Calculator works it out for any size.

Are my images uploaded?

No. They are read in your browser and never sent anywhere.