Online Batch Image Resizer - Resize by Dimensions, Percent, or Longest Edge - Master Tools

A free online batch image resizer with no sign-up required. Batch process JPG, PNG, WebP, and similar files locally in your browser to resize images with no server upload, keeping your files private. Export multiple formats and reduce file size for website images, product catalogs, avatars, thumbnails, and content management workflows.

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Online Batch Image Resizer - Resize by Dimensions, Percent, or Longest Edge
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A free online batch image resizer with no sign-up required. Batch process JPG, PNG, WebP, and similar files locally in your browser to resize images with no server upload, keeping your files private. Export multiple formats and reduce file size for website images, product catalogs, avatars, thumbnails, and content management workflows.

Features

Resize by dimensions
Resize by percentage
Resize by longest edge
Batch local export
+1 more features

Usage Examples

Basic Usage

Batch Image Resizer Usage Example

Usage Steps:

  1. Upload images - Drag multiple files into the upload area or pick them from your device
  2. Choose a resize mode - Switch between dimensions, percentage, or longest-edge resizing
  3. Adjust output settings - Set width, height, scale, or longest edge, then choose format, quality, and upscale behavior
  4. Process locally - Click Resize All to let the browser render each output
  5. Download results - Save images one by one or download the full ZIP package

Features:

  • Three resize workflows - Supports dimensions, percentage scaling, and longest-edge constraints
  • 100% client-side processing - Source images stay on the device
  • Batch export - Process large queues and download all results as a ZIP
  • Output control - Choose export format and JPEG/WebP quality
  • Upscale protection - Keep smaller images at original size when needed
  • File-size reduction - Shrinking pixel dimensions often reduces total image size for web delivery

Use Cases:

  • Website assets - Standardize blog, landing-page, and CMS image dimensions
  • E-commerce ops - Batch resize product photos to platform requirements
  • Content operations - Normalize posters, covers, and campaign images
  • Developer workflows - Prepare image assets before importing into admin systems
  • Storage optimization - Reduce resolution to lower transfer and storage costs

Common Questions (Q&A):

  1. Q: Will resizing affect sharpness?
    A: Yes. Downscaling usually works well, while upscaling can look blurry. Start from a high-resolution source when possible.
  2. Q: How do I create the same size for many images?
    A: Upload multiple images, set target width and height, choose the resize mode and format, then export the batch.
  3. Q: Are resized images uploaded?
    A: No. Resizing runs locally in the browser, which is useful for product images, avatars, and content assets.