Free tool · works offline · no upload
Image Compressor
Shrink JPG, PNG and WebP images by up to 90% without visible quality loss. Compress one or a hundred at once.
Heavy images slow your whole site
Want every image on your site optimised?
Oversized images are the most common reason websites load slowly. I can optimise your whole site, set up automatic WebP conversion and lazy loading, and get your speed score into the green.
How to compress images for your website
- Add your images. Drag them in, choose files, or paste a screenshot with Ctrl+V.
- Pick a quality. 75 suits most websites. Watch the savings update as you move the slider.
- Resize if needed. A photo 6000 pixels wide is far bigger than any screen. Setting a max width often saves more than compression alone.
- Download. Save each image, or all of them as one ZIP file.
Why image size matters
Images are usually the heaviest part of a web page. A single unoptimised hero photo can weigh 5 MB, more than the rest of the page combined. That slows down your Largest Contentful Paint, one of Google's Core Web Vitals, and costs visitors on mobile data real money. Compressing images is the quickest speed win available.
JPG, PNG, WebP or AVIF?
- JPG: best for photos when you need maximum compatibility, like email.
- PNG: lossless, for screenshots, logos and graphics that need sharp edges or transparency. Files are large.
- WebP: the best default for websites. Smaller than JPG and PNG, supports transparency, works in all modern browsers.
- AVIF: even smaller than WebP, but slower to create and not supported by every browser or editor yet.
Want to change format without compressing? Use the Image Converter. Need exact dimensions? Try the Image Resizer. After optimising, check the result with the Page Speed Checker.
Frequently asked questions
Are my images uploaded to a server?
No. Compression happens entirely inside your browser using your own device. Your images never leave your computer or phone, so it is safe for private photos and client work.
How much smaller will my images get?
Photos straight from a phone or camera usually shrink by 60 to 90 percent with no visible difference. Images that were already optimised may only shrink a little, and the tool keeps the original if it cannot make the file smaller.
What quality setting should I use?
70 to 80 is the sweet spot for websites: big savings and no visible loss. Go to 60 for thumbnails and backgrounds, or 85 to 90 for photography portfolios where detail matters.
Why did my PNG barely get smaller?
PNG is a lossless format, so it cannot be squeezed much without changing format. Choose WebP as the output: it supports transparency like PNG and is often 70 to 90 percent smaller.
Is there a file size or number limit?
There is no limit set by the tool. You can compress dozens of images at once and download them as a ZIP. Very large images (over about 50 megapixels) depend on your device memory.
Does compressing remove photo location data?
Yes. The new file is created from the pixels only, so camera details and GPS location (EXIF data) are removed. That is good for privacy and saves a few more kilobytes.
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