Runs in your browser. Nothing you enter is uploaded or stored.
To compress an image for the web, reduce its file size until it still looks right at the size it is displayed, and save it in a modern format such as WebP. The free Image Compressor and WebP Converter does this in your browser, so your files never leave your device and nothing is stored.
Speed is worth the effort: a Deloitte study of 37 European and American brand sites and over 30 million user sessions, published on web.dev as Milliseconds make millions, found that a 0.1 second improvement in four mobile speed metrics lifted retail conversions by 8.4% and average order value by 9.2%.
How to use the Image Compressor and WebP Converter
- Pick the images you want to shrink. Start with the largest ones on your slowest pages, usually hero banners, product photos and blog headers.
- Compress them, converting to WebP where that suits the page.
- Because it all happens in your browser, there is no upload wait.
- Compare the new file size with the original and look at the image at the size it will actually appear on the page.
- Download the result and replace the old file on your site. Keep your original somewhere safe in case you need to start again.
How to read the results
The number that matters is the saving: how much smaller the new file is than the original. A large saving with no visible change is the outcome you want. If you can see blocky edges, smeared text or banding in smooth gradients, the file has been squeezed too far and you should compress it less.
Judge quality at the displayed size, not by zooming in to 400 per cent. A photo that fills a phone screen needs more care than a thumbnail in a card. Logos, screenshots with text and line art tend to show damage sooner than photographs, so check those closely.
What to fix
- Camera photos uploaded as they came. A photo straight from a phone is far larger than any web page needs. Resize it to its display dimensions first with the Image Resizer, then compress it.
- PNG used for photographs. PNG suits flat graphics and transparency. For photographs, WebP or JPEG is normally much smaller.
- The same image served at one size and shown at another. Compression cannot rescue an image that is five times wider than its slot.
- Above-the-fold images. The main image near the top of a page often becomes the Largest Contentful Paint element, so it deserves the most attention. You can confirm its effect with the PageSpeed and Core Web Vitals Checker.
Why this matters for SEO
Page experience is not decided by images alone, but images are often the heaviest part of a page, so they are the easiest place to win back time. Faster pages are easier for visitors to use, and Core Web Vitals, which include loading speed, are part of how Google describes page experience. Smaller images also help mobile visitors on slow connections, which matters for audiences in Pakistan, the Gulf and elsewhere where network quality varies.
Limits to keep in mind
Compression is a trade between size and quality, and no tool can choose that trade for you. Converting to WebP is widely supported by current browsers, but if you serve an older audience or an email client, keep a fallback. This tool works on files you give it; it does not change the images already on your website, and it does not rewrite your page code to use them. Always keep your originals, because repeated compression of an already compressed file loses more detail each time.
A worked example (illustrative)
Imagine a bakery in Lahore whose home page opens with a photo taken on a phone. The file is huge, and it is displayed in a banner far narrower than the photo itself. The owner first resizes the picture to the banner width, then runs it through the compressor and converts it to WebP. The new file is a fraction of the original, and at normal viewing size nobody can see a difference. The owner repeats the process for the product photos further down the page and replaces the files on the site. The page now has far less to download before the visitor sees anything useful, which is exactly the point of the exercise.
The lesson from the example is the order of work: resize first, compress second, check visually third. Skipping the first step is the most common reason people feel compression “did not do much”.
If you do not know which pages are heavy, start with the Page Size Checker to see how many images a page loads, then come back here to shrink the biggest ones.
Questions about the Image Compressor and WebP Converter
Does the Image Compressor upload my pictures anywhere?
No. The work happens in your browser on your own device, so your files are not uploaded or stored by this site.
Should I convert every image to WebP?
Usually it is a good default for photographs and graphics on web pages, because WebP files are typically smaller than JPEG or PNG at similar quality. Check the result visually, and keep the original format for anywhere WebP is not accepted.
Why is my image still large after compressing?
The most common reason is that the pixel dimensions are bigger than needed. Resize the image to the width it is displayed at, then compress again.
Heavy images are one of the most common reasons a page feels slow, and fixing them is rarely complicated. Browse all the free SEO tools, see the full free image and website speed tools collection, or read about my website speed optimisation services. If you would like a person to look at your site, ask for a free audit.