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Bulk Image Compressor: Compress Many Images at Once, Free

Compress a whole folder of photos in one go. Add up to 50 JPG, PNG or WebP images, choose a quality or an exact file size, and download them all as one ZIP file. Your images never leave your device.

Your images never leave your device. No sign-up, no watermark.

Compress by

75% makes files much smaller and still looks the same to most people.

How to compress many images at once

  1. Select all your images at once (Ctrl+A or Cmd+A in the file window), or drag a group of them into the box.
  2. Choose “Quality” to make every image smaller by the same amount, or “Exact file size” to get each one under a limit such as 100 KB.
  3. Pick a format, or keep the original one, and wait for the list to finish.
  4. Click “Download all (ZIP)” to save them together.

Quality or exact file size?

  • Quality: best for a batch of photos for a website, an album or email. 75% makes files much smaller and still looks the same to most people.
  • Exact file size: best when every file must be under a limit, such as uploads that accept 200 KB or less. Each image is made just under the size you set.

Saving as WebP usually gives the smallest files. Keep JPG if the images are going somewhere that may not accept WebP.

Questions

How many images can I compress at once?

Up to 50 per batch. For more, download the ZIP, click “Start over” and add the next group.

Do my images get uploaded?

No. They are compressed in your browser on your own device, which is also why it’s fast: there is nothing to upload or download from a server.

Will the file names stay the same?

Almost. Each file keeps its name with “-compressed” added, so you can’t mix it up with the original. The extension changes only if you switch format.

Can I see how much smaller each image got?

Yes. Every image in the list shows its size before and after, and the total saving appears at the top. Click an image to compare the original and compressed versions with a slider.

Is there a size or daily limit?

There’s no daily limit and no sign-up. Very large photos (above about 50 megapixels) are scaled down slightly so your browser can handle them.

More tools: Image Compressor, Image Optimizer, Bulk Image Resizer, Compress to 100 KB, Image Converter.