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Bulk Image Compressor

Resize and compress a batch of images into one ZIP.

Tool inputs stay in your browser · optional AI search sends your query

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Good to know: Choose up to 20 JPG, PNG or WebP images,20 MB per file and40 MB total. Processes images sequentially, caps each decoded image at24 megapixels, resizes to your chosen longest edge and exports JPEGs into a ZIP. Transparency becomes white, animation is lost, and output may be larger than an already optimized original. Check quality before deleting originals. Files are processed on your device, not sent to our server. Limits protect browser memory; close other heavy tabs on older phones.

How to use it (step by step)

  1. 1Choose several photos.
  2. 2Pick the quality and size.
  3. 3Download all the smaller photos in one ZIP.

Words to know

Compression
Making a file smaller, usually by lowering quality a little, so it uploads and sends faster.
ZIP
One file that holds many files inside, like a folder you can send.
Resolution / pixels
A picture is made of tiny dots called pixels. 1080×1920 means 1,080 dots wide and 1,920 tall.
JPG, PNG, WebP
Picture file types. JPG is best for photos, PNG for graphics and see-through backgrounds, WebP is newer and smaller.
Data storage units
Sizes of digital files: 1 KB ≈ a short text, 1 MB ≈ a photo, 1 GB ≈ a movie. 1 GB = 1,000 MB (or 1,024 in computer counting).

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