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Bulk Image Compression

Compress multiple images at once to shrink file size while keeping quality — fast, free and right in your browser.

Compress your images

Add images, pick a quality or a target size, compare the result and download.

Choose images or drop them here — select several at once JPG, PNG, WebP, GIF, BMP · compressed in your browser, never uploaded

Compression mode

By quality Target size

Quality 70%

Output format Max width

How it works

Select your images

Choose one or many JPG, PNG or GIF files from your device.

Compress the batch

Hit Compress Images and watch the progress bar optimise every file.

Download the ZIP

Grab all of your smaller, optimised images in a single ZIP archive.

About the Bulk Image Compression tool

The Bulk Image Compression online tool is a convenient web-based solution that lets you compress multiple images simultaneously. It provides an efficient way to reduce the file size of your images without sacrificing visual quality. Upload a batch of pictures in popular formats such as JPG, PNG or GIF, and the tool applies smart compression to optimise each file. Everything runs directly in your browser, so your images stay private and the results are ready in seconds.

Once compression is complete, you can download every optimised image together in a single ZIP file. This tool is especially useful for anyone working with a large number of images — website owners, bloggers, photographers and graphic designers. By compressing in bulk, you make your images lighter and faster to load, which speeds up web pages, saves storage space and makes files far easier to share, store or publish online.

What you get

Batch compression

Compress many images at once instead of one slow file at a time.

One-click ZIP download

Every optimised image is bundled into a single downloadable ZIP.

Private & in-browser

Images are processed locally and never uploaded to any server.

Smaller, faster files

Cut file size to speed up pages, save storage and share easily.

Frequently asked questions

Is the bulk image compressor free?

Yes — it is completely free and unlimited. There is no account, login or watermark, and you can compress as many batches of images as you like.

Which image formats are supported?

You can upload common web formats such as JPG, PNG and GIF. Each image is optimised and downloaded together in a single ZIP file.

Are my images uploaded to a server?

No. All compression happens locally inside your browser using JavaScript, so your images never leave your device — keeping them completely private.

Can I compress images to a specific size, like under 200 KB?

Yes. Switch the mode to "Target size" and enter a size in KB. The tool lowers quality first and only reduces dimensions if the image still does not fit, so every image ends up at or below your limit with the best quality possible.

What does the Smart format do?

Smart tries both JPG and WebP for each photo and keeps whichever file is smaller. Images with transparency are saved as WebP so the transparent areas are kept. If a compressed file would be larger than the original, the original is kept instead.

How do I download the compressed images?

Each image gets its own download button, and a "Download all as ZIP" button saves the whole batch at once. A single image downloads directly, without a ZIP.

Runs in your browser — nothing is uploaded No sign-up Free

Last updated 5 Nov 2026 · Maintained by the WizBrand team