How to compress images
Drop one or more images onto the box, or click it to choose files. Each image is compressed straight away, and the list shows the old size, the new size and how much you saved. Download images one at a time or click Download all. Change the quality, format or maximum width and the images are compressed again with the new settings.
Unlike most online compressors, this one never uploads your images. They're processed by your own browser, so it's safe for private photos and client files, and there's no upload wait.
Settings explained
- Quality controls how much detail JPG and WebP keep. Around 70 to 80 percent cuts file size dramatically while looking the same to most people. Go lower for thumbnails, higher for photography portfolios.
- Save as WebP usually gives the biggest saving: WebP files are typically 25 to 35 percent smaller than JPG at the same quality, and much smaller than PNG for photos. All current browsers support WebP.
- Max width shrinks very large images. A photo straight from a phone is often 4000 pixels wide, but most websites never show images wider than 1920 pixels, so resizing alone can cut the file by 70 percent or more.
- Background fills transparent areas when converting PNG images to JPG, which doesn't support transparency.
Why image size matters for SEO
Images are usually the heaviest part of a web page. Large images slow pages down, especially on mobile data, and page speed affects both visitors and Google's Core Web Vitals, in particular Largest Contentful Paint, which is often a big hero image. Compressing images before you upload them is one of the quickest ways to speed up a website. As a rough guide, keep photos for the web under 200 KB and large hero images under about 300 KB.
PNG files and "already optimized"
PNG is a lossless format, so the browser can't make PNG files much smaller without changing them. To shrink a PNG photo or screenshot, choose WebP or JPG under Save as. When compressing can't make a file any smaller, the tool keeps your original and marks it as already optimized, so you never end up with a bigger file. To change the dimensions to an exact size, use the Image Resizer, and to switch format without compressing, use the Image Converter.
Frequently asked questions
Are my images uploaded?
No. They're compressed in your browser and never leave your device.
What quality should I use?
70 to 80 percent is a good balance for websites. The difference from the original is hard to see, and files are much smaller.
Why didn't my PNG get smaller?
PNG is lossless, so there's little to remove. Choose WebP or JPG under "Save as" for a much smaller file.
How many images can I compress at once?
Up to 50 images at a time, with no daily limit.
Is WebP supported everywhere?
Yes. All current versions of Chrome, Safari, Firefox and Edge display WebP, and so do WordPress and most website builders.
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