PixelForgeImage Data Studio
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Compress & Optimize

Bulk Image Resizer

Batch resize multiple images at once.

Drop images to bulk resize

Supports JPG, PNG, WebP, HEIC, TIFF and more · Max 40 MB MB

What is Bulk Image Resizer?

Batch resize multiple images at once. Resize dozens of images at once with consistent width, height or percentage. Normalize a product photo library to uniform dimensions before upload. A ZIP of resized images in JPG/PNG/WebP at your chosen quality.

All processing happens locally in your browser. Your images are never uploaded to any server.

Key Features

  • Fit-to-width, fit-to-height, longest-edge, or percentage modes
  • Optional sharpening after downscale for crisp edges
  • Parallel processing in the browser — no upload queue

Common Use Cases

  • Resizing hundreds of product photos to uniform dimensions for an e-commerce catalog
  • Creating multiple image sizes for responsive srcset attributes in one batch operation
  • Scaling down large camera photos before uploading to a CMS or cloud storage
User Guide

How to use this tool

The Bulk Image Resizer applies the same resize + re-encode operation to dozens of images in one go. It is designed for product-catalog owners, blog authors, and SEO teams who receive raw camera images and need to output a consistent, web-ready set to feed into their CMS or CDN.

How to use it

Drop many images onto the upload zone. Choose a target width (height defaults to Auto to preserve aspect ratio, or override it if you need a specific canvas size). Pick the output format — JPG for photographs, PNG for transparent assets, or WebP for maximum compression.

Click Resize All to process every image in parallel. A thumbnail grid shows the results with old dimensions and new file sizes. Bundle everything into a ZIP with one click, sequentially named for easy import.

  • Batch resize with a single target width
  • Aspect-ratio lock or explicit width/height override
  • Output as JPG, PNG or WebP with adjustable quality
  • Automatic sequential naming and ZIP export

Recommended presets

For blog inline images target 1200 px width at 82% quality WebP — big enough for Retina displays, small enough to keep pages fast. For hero banners and social share cards, use 1920 px width at 85%.

Thumbnails for product grids should sit at 480–40 px width. Anything smaller is likely too pixelated on modern high-DPI screens.

Frequently Asked Questions

Can I use different sizes per image?

Use the single resize tool for per-image settings; bulk applies the same rule to every file.

Does upscaling work?

Yes but we don't invent new detail — upscaled images look soft unless you enable sharpening.

Can I set different dimensions for each image?

The batch resizer applies the same dimensions to all images. For individual control, use the single-image Resize Image tool. You can choose to preserve aspect ratio or stretch to exact dimensions.

What is the maximum batch size?

There is no hard limit, but processing hundreds of large images simultaneously may consume significant memory in your browser. We recommend batches of 50–100 images for optimal performance.

Does resizing reduce image quality?

Downscaling always produces a smaller image but uses high-quality resampling. You can choose the output format (JPG, PNG, WebP) and quality to control the trade-off.

Is this tool free to use?

Yes. This tool is completely free with no sign-up, no watermarks, and no daily limits. All processing runs locally in your browser.

Do transparent images survive the pipeline?

Yes if you choose PNG or WebP as the output format. JPG will flatten transparency to white.

Is there a limit on the number of files?

Practical limit is 50–00 images per session, depending on RAM. Split larger batches.

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WebP Compressor

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Optimize Images for Web

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