Bulk Image Resizer Resize multiple images at once to the same dimensions with batch processing.

What Is Bulk Image Resizer?

A bulk image resizer lets you resize multiple images simultaneously to consistent dimensions. Upload an entire batch and apply the same resizing parameters to all of them. Choose from three resize modes: by width (maintains aspect ratio), by height (maintains aspect ratio), or exact dimensions. This is essential for e-commerce product photos, social media content batches, website image standardization, and any workflow requiring consistent dimensions across many files. All processing happens in your browser.

Why Use Bulk Image Resizer?

• Process multiple images in a single batch operation
• Three resize modes: by width, by height, or exact size
• Download individual results or all at once
• Browser-based — images never leave your device

Common Use Cases

E-Commerce

Standardize product photo dimensions for consistent catalog listings.

Social Media Batches

Resize a batch of images to the same dimensions for scheduled social posts.

Website Assets

Resize all images for a website to maximum width constraints.

Photography Portfolio

Standardize portfolio image sizes for gallery displays.

Technical Guide

Batch resizing processes images sequentially using a single shared canvas element. Each image is loaded via Object URL, drawn to the canvas at target dimensions, and exported as PNG. In by-width mode, height is calculated proportionally. Processing is sequential to manage memory. Original and new dimensions are displayed for each processed image.

Tips & Best Practices

• 1
  Use By Width mode to maintain aspect ratios while standardizing widths
• 2
  Add images one at a time or batch-select from your file picker
• 3
  Remove unwanted files from the list before processing
• 4
  For very large batches (50+ images), process in groups to avoid memory issues

Related Tools

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Frequently Asked Questions

Q How many images can I process at once?

No hard limit, but very large batches may cause browser slowness. Process in groups of 20-50.

Q Will aspect ratios be maintained?

In By Width and By Height modes, yes. In Exact mode, images may be stretched.

Q What format is the output?

All resized images are saved as PNG.

Q Can I set different sizes for different images?

No, all images in a batch are resized to the same target dimensions.

Q Does it preserve EXIF data?

No, canvas-based resizing strips EXIF metadata.

About This Tool

Bulk Image Resizer is a free online tool by FreeToolkit.ai. All processing happens directly in your browser — your data never leaves your device. No registration or installation required.