Free Online Bulk Image Resizer

Resize multiple images instantly with ImgTool.app. Free online bulk image resizer that works 100% locally in your browser. Resize JPG, PNG, GIF, WebP, and HEIC for social media or web use without losing quality. Perfect for batch processing photos.

Upload Images

Drop, select, or paste images to start (max 15).

  • Local processing for privacy
  • Bulk handling
  • Zip download
  • Custom dimensions & presets
  • Quality & format control
  • Multi-format support

Key Features of Our Free Online Bulk Image Resizer Tool

Local Processing

All resizing happens in your browser—no uploads, ensuring privacy and speed.

Bulk Handling

Resize multiple images at once with shared settings.

Zip Download

Download all resized images in a convenient zip file.

Custom Dimensions & Presets

Enter custom width/height or use presets for social media like Instagram, YouTube.

Quality & Format Control

Adjust quality, resize percentage, and download in JPG, PNG, or WebP.

Multi-Format Support

Resize JPG, PNG, GIF, WebP, and HEIC images effortlessly.

Try ImgTool.app for Bulk Resizing Images Online?

ImgTool.app is a simple, free bulk image resizer tool that processes everything client-side for maximum privacy. Whether you're preparing batches of photos for e-commerce, blogs, or social media, our online bulk image resizer helps you achieve perfect dimensions quickly without uploading your files.

For single images, use our image resizer or cropper. Compress batches with the image compressor. All tools run locally in your browser.

Tips for Bulk Resizing Images

Use percentage scaling for uniform reduction, or fixed dimensions for consistent sizes. Lock aspect ratio to avoid distortion. For social media, presets ensure perfect fits.

Bulk Image Resizer FAQ

Upload multiple images, set dimensions or use presets, adjust settings, and download the resized images in a zip file—all locally in your browser.

Yes, 100% free with no account needed. Your images never leave your device.

Supports JPG, PNG, GIF, WebP, and HEIC for input, with output in JPG, PNG, or WebP.

Yes, use presets for Instagram posts/stories, YouTube thumbnails, Facebook covers, and more.

Absolutely, the tool is fully responsive and works on desktops, tablets, and mobiles.