COMPRESS · FREE ONLINE TOOL

Bulk Image CompressorLighter files. Ready to share.

Compress your images in bulk, with control over quality and target file size.

Free, without limits on usage Files stay on your device No sign-up needed

01 Your batch 0

Drop a batch of images here

Select multiple images at once, or add more later

JPG, PNG or WebP · Up to 30 images, 20 MB each

Your images never leave your browser. That’s a promise.

Built for the whole batch

Skip the one-at-a-time routine.
Get your images ready together.

Your files, your business

No uploads, no stored copies.
Everything happens on your device.

COMING SOON

Give your pixels a promotion.

Meet AI-powered image upscaling

01 / WHAT

What does the bulk image compressor do?

Reduce file weight

Upload JPG, PNG or WebP files into the local tool and choose output quality or a maximum file size in KB.

Export smaller working copies

Each result shows the original and output file sizes along with its new dimensions. Download successful files individually or in a ZIP.

A size target can change dimensions

To fit a strict limit, the tool may lower quality and reduce pixel dimensions. A tiny target cannot guarantee the original detail or resolution.

coast photo-style sample before processing, 1536 by 1024 pixels — AI-generated photographic sample assets, processed with this tool’s image engine. Download an output to inspect it at full size. Use “Try a 3-image sample batch” above to process these files yourself.

coast photo-style sample after compress, 968 by 645 pixels — AI-generated photographic sample assets, processed with this tool’s image engine. Download an output to inspect it at full size. Use “Try a 3-image sample batch” above to process these files yourself.

02 / WHERE

Where can compressed images be used?

File upload forms

Prepare an image for a form with a file-size ceiling. Check its format and dimension rules separately before submitting.

Email attachments

Create lighter image copies for attachment-based workflows instead of sending large original files.

Website media folders

Prepare compact assets for your own website, then inspect the exported detail at the display size you plan to use.

03 / WHY

Why compress a batch together?

Apply a common limit

Set one maximum file size for the batch instead of repeatedly exporting each image with different settings.

See the actual result

Compare output bytes and dimensions before download. A successful target-size export stays at or below the selected KB limit.

Control the tradeoff locally

Try a higher target when details become too soft. The free tool performs its encoding on your device without uploading your photos.

04 / WHEN

When should you compress photos?

An upload rejects a large file

Choose a maximum KB target below the destination’s limit, then recheck any separate pixel or format restrictions.

Image attachments become unwieldy

Reduce file weight before sharing a collection that does not require full-resolution originals.

You are preparing final web assets

Compress after deciding the required crop and display dimensions, then check small text and edges in the result.

GOOD TO KNOW

Frequently asked questions

Does 20 KB mean exactly 20 KB?

No. It is an upper limit of 20 × 1024 bytes, not an exact output size. The exported file can be smaller.

Will compression keep my original dimensions?

Quality-only mode keeps dimensions. When a maximum KB target is set, the tool may shrink dimensions if encoding quality alone cannot meet it.

Why does the quality slider disappear for PNG?

PNG encoding here does not use the JPG/WebP quality control. A PNG file-size target can instead require smaller pixel dimensions.

How do I keep transparency?

Choose PNG or WebP output. JPG does not support transparency, so transparent regions are filled with white.

Are my photos uploaded or saved by the service?

No. This free compressor processes the files in your browser. It supports 30 images per batch and 20 MB per file; original EXIF metadata is not retained.