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Bulk Image Resizer

Resize dozens of images at once with one setting. Everything runs in your browser.

Drop images here

JPG · PNG · WEBP

Apply one size to a whole folder of images at once. Add per-file overrides where you need them, watch the batch progress, and download everything as a ZIP.

How to resize images in bulk

  1. Add all your images — drag a selection in or pick them from your device.
  2. Set one width or height for the whole batch.
  3. Adjust individual files first if a few need a different size.
  4. Click Resize. Failed files are skipped and flagged; the rest keep going.
  5. Download All to get a single ZIP.

How many images can it handle

At least 50 normal photos process smoothly on a typical laptop. The real limit is your device's memory, not a server quota.

If a batch is large for your device, the tool warns you before it starts and lets you reduce it rather than freezing. On phones, work in smaller groups.

Everything happens in your browser using your device's own processing power. Your images are never uploaded to PrepImages, and nothing is stored after you close the tab.

Common uses

  • Standardising an entire product catalogue to one size
  • Preparing a shoot's worth of images for a website
  • Batch-shrinking a photo archive before backup

Frequently asked questions

How many images can I resize at once?

At least 50 normal photos work smoothly on a typical laptop. Very large batches on a phone may need to be split — the tool will warn you and let you reduce the batch instead of failing.

Can different images use different sizes?

The batch shares one setting by default. You can override the size on individual files before processing.

What happens if one image fails?

Only that file is affected. The rest of the batch still processes, and you can retry or remove the failed image.