Up to 100 ImagesZIP Download100% Private

Drop images here (up to 100)

or click to browse

JPGPNGWebP|Max 50 MB

How It Works

1

Upload Images

Drop up to 100 images at once.

2

Set Quality

Choose quality level and optional forced format.

3

Download ZIP

All compressed images in one ZIP download.

Frequently Asked Questions

How many images can I compress at once?
You can compress up to 100 images in a single batch. All processing happens in your browser, so the speed depends on your device performance.
Can I force all images to the same format?
Yes. Use the Force Format option to convert all images to JPG, PNG, or WebP during compression. Leave it set to "Keep Original" to maintain each file's original format.
How do I download all compressed images?
After compression completes, click the "Download ZIP" button to download all compressed images in a single ZIP archive.
What quality setting should I use for batch compression?
For web optimization, 70-80% works well. For email attachments, 60-75% provides good size reduction. For archival quality, use 90-95%.
Are my images sent to any server?
No. All compression and ZIP creation happen entirely in your browser. Your images never leave your device.
Share:

About Bulk Compressor

What this tool does

Image editing tools let you resize, crop, compress, rotate, flip, and add watermarks to your images. All operations happen in-browser using the HTML5 Canvas, so your photos stay on your machine and are never uploaded to any server.

Why use this tool

Preparing images for a website, social media post, or email attachment usually means opening a heavy editor like Photoshop. These tools give you the most common operations in a single click, without any installation, account, or subscription.

How it works

Each tool reads your image into a canvas element, applies the requested transformation (scale, crop region, rotation angle, compression level), and generates a new downloadable file. Batch mode processes multiple images with the same settings in sequence.

Pro tip

When resizing for the web, aim for 2x the display dimensions to look sharp on Retina screens, then compress at 75-80% quality. This gives you the best balance of sharpness and speed.

Deep Dive: Related Research

Image Compression Benchmark 2026: 10 Formats Tested Across 1,000 Images

12,000 words · 25 min read

Web Performance Format Guide 2026: Images, Fonts, Scripts, and Core Web Vitals

11,500 words · 24 min read

The Complete Web Performance Guide 2026: Core Web Vitals, Bundle Analysis, Lazy Loading & Caching

30,000 words · 60 min read

Part of these workflows

Website Image Optimization

3 steps

Explore More

Love this tool? Explore 12467+ more

Free online tools for images, PDFs, text, code, and more. All running in your browser.

Explore All Tools