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画像リサイズ

画像のサイズを変更

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 here

or

JPG, PNG, WebP, AVIF, GIF, BMP, TIFF, SVG, HEIC or PSD/PSB · one or many

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 resize an image

  1. Choose one or more images.
  2. Pick a percentage, or switch to Pixels and enter a size or choose a common size such as an Instagram post or YouTube thumbnail.
  3. Choose how to handle a different shape: fit inside, fill and crop, or stretch.
  4. Press Resize and download the results.

Resizing options

  • Percentage: 25%, 50%, 75% or any custom value.
  • Pixels: enter a width, a height or both. With only one, the other is calculated from the image's shape.
  • Common sizes for Instagram, Stories and Reels, YouTube, X, LinkedIn, Pinterest, screens and 300 DPI prints.
  • Fit inside keeps the whole image. Fill and crop gives the exact size and trims the edges, as social media sizes need. Stretch gives the exact size by distorting the image.
  • Smaller images aren't enlarged when fitting inside, unless you allow it under Advanced Options.
  • Large reductions are done in steps for a sharper result.

Is my image uploaded?

No. Your images are resized by your own browser and never leave your device.

よくある質問

How do I resize an image without stretching it?

Enter only a width (or only a height), or choose "Fit inside" or "Fill the exact size". Only "Stretch" changes the image's shape.

How do I make an image exactly 1080 × 1080 for Instagram?

Choose "Instagram post, square" under Common sizes. The image fills the square and the edges that don't fit are trimmed equally on both sides. Use the Image Cropper if you want to choose which part to keep.

Can I resize several images at once?

Yes. Add as many images as you like, choose the size once, and they are all resized. You can download them individually or as a ZIP.

Which format is the resized image saved in?

By default the same format as the original when the browser can create it (JPG, PNG, WebP, AVIF, GIF, BMP, TIFF). You can choose JPG, PNG, WebP or AVIF under Advanced Options.

Are my images uploaded?

No. Resizing happens in your browser. Nothing is sent to a server.