Image Tools
4 min read
March 8, 2026

How to Batch Resize Multiple Images at Once (Free Online Tool)

Stop resizing images one by one. Here's how to resize a whole batch at once and download them all together — completely free.

The Problem With Resizing Images One by One

If you've ever had to resize 30 product photos or social media graphics individually, you know how tedious it is — open, resize, export, repeat. A batch tool turns that half-hour chore into a 30-second task.

What Our Batch Resizer Does

The Batch Image Resizer lets you upload multiple images at once, set a single target width and height (with optional aspect-ratio lock), and resize every image in one click — then download them all together as a ZIP file.

Common Use Cases

  • Preparing a batch of product photos to a consistent size for an online store
  • Resizing a folder of phone photos before uploading to a website
  • Standardising image dimensions across a presentation or document
  • Creating consistently-sized thumbnails for a gallery or portfolio
  • Step-by-Step

  • Open the Batch Image Resizer
  • Drag in multiple images
  • Set your target width and height (toggle "keep aspect ratio" to avoid distortion)
  • Click resize, then download every result as a single ZIP
  • Tips

  • Enable "keep aspect ratio" when your images have different proportions, to avoid stretching
  • Use a consistent filename prefix to keep your resized batch organised
  • For final web use, follow up with the Image Compressor to shrink file sizes further
  • Frequently Asked Questions

    How many images can I resize at once?

    Add as many as you need — processing happens directly in your browser, so the practical limit depends on your device's memory.

    Will all my images come out the exact same size?

    If "keep aspect ratio" is off, yes — every image is forced to your exact width and height. If it's on, width is fixed and height adjusts proportionally per image.

    Is my data uploaded to a server?

    No — all resizing happens locally in your browser; your images never leave your device until you download the ZIP.

    Related Tools

    You may also like the Image Upscaler for enlarging images, or the Image Cropper for precise framing.

    Written by the GMC Tools team