Compress images by up to 90%
without losing quality
Drag, drop, and compress JPG, PNG & WebP images in bulk.
Drop your images here
or click to browse — JPG, PNG, WebP, GIF & BMP
Select ImagesAspect ratio is kept automatically. Leave a field empty for no limit on that side.
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Everything you need to optimize images
A complete, privacy-first compression toolkit that runs 100% in the browser.
Blazing Fast
Compression runs on a background Web Worker, so even multi-megabyte images process without freezing the page.
100% Private
Your images are processed locally and never uploaded to any server. Total privacy by design.
Fully Responsive
A polished interface that adapts beautifully to phones, tablets, and desktops with light & dark themes.
Bulk Processing
Compress up to 60 images at once and download them together as a single ZIP archive.
Smart Resize
Optionally cap the largest dimension to slash file sizes even further while keeping aspect ratio.
Format Conversion
Convert between JPG, PNG, and modern WebP to get the best size-to-quality ratio for any use case.
How to Compress Images Online for Free
Compressing images before uploading them to your website is one of the easiest ways to improve page speed and user experience. Our free Bulk Image Compressor lets you shrink JPG, PNG, and WebP files by up to 90% without losing visible quality — and everything happens directly in your browser. No file is ever uploaded to a server, so your images stay completely private.
Simply drag and drop your images, choose your preferred quality level and output format, and download a single ZIP file containing all compressed images. Whether you're optimizing photos for a blog, an online store, or a portfolio, this tool helps you reduce file size while keeping your images sharp and clear.
Why Image Compression Matters
Large image files are one of the most common reasons websites load slowly. Slow-loading pages affect both user experience and search engine rankings, since Google considers page speed as part of Core Web Vitals. By compressing your images, you reduce bandwidth usage, speed up page load times, and improve your website's overall performance score.
This is especially important for WordPress websites, online stores, and photographers who upload large batches of images regularly. With bulk compression, you can process up to 60 images at once instead of compressing them one by one.
Frequently Asked Questions
Does compressing images reduce their quality?
Our compressor uses smart lossy and lossless compression techniques that significantly reduce file size while keeping image quality visually identical. You can adjust the quality slider to find the right balance between file size and visual clarity for your needs.
Is there a limit on file size or number of images?
You can compress up to 60 images at once, with each file supporting sizes up to 80 MB. This makes it suitable for both individual use and bulk processing tasks.
Are my images uploaded to a server?
No. All compression happens locally in your browser using modern web technology. Your images are never uploaded, stored, or shared, ensuring complete privacy.
What image formats are supported?
The tool supports JPG, PNG, WebP, GIF, and BMP formats. You can also convert between JPG, PNG, and WebP during compression to get the best balance of quality and file size for your specific use case.
Is this tool really free to use?
Yes, the Bulk Image Compressor is completely free with no hidden limits, sign-up requirements, or watermarks added to your images.