Free online tool
Image Compressor
Shrink JPG, PNG and WebP files right in your browser — nothing gets uploaded.
Why compress images?
Images are usually the heaviest part of a web page. Compressing them makes your site load faster, improves your Core Web Vitals score, and lowers bandwidth costs — for you and your visitors. On mobile networks, the difference between a 2 MB and a 200 KB hero image can be several seconds of load time.
How this tool works
Your image is drawn into a hidden canvas element and re-encoded at the quality you choose. Everything happens inside your browser — the file never leaves your computer, so it's safe to compress private photos, screenshots or client work.
Picking the right quality
For photos, 70–80% quality usually looks indistinguishable from the original at a fraction of the size. Screenshots and graphics with text often need 85–95%. If you notice color banding or blocky edges, bump the quality up.
+Do you keep my images?
No. Compression happens entirely in your browser. Nothing is uploaded to any server.
+What formats are supported?
JPG, PNG and WebP. PNGs are recompressed losslessly by the browser.
Why use the Image Compressor on ToolNest?
The Image Compressor is one of more than forty free browser-based utilities we maintain on ToolNest. Every tool on the site is engineered around the same three promises: it must be fast, it must protect your privacy, and it must be genuinely useful without hiding features behind an account, a paywall, or an email capture form. Whether you use the Image Compressoronce a month or several times a day, it should feel like a native part of your workflow — open the tab, get the result, move on.
Everything happens directly inside your web browser. When you type, paste, or upload something into the Image Compressor, that data never leaves your device. There is no server round-trip, no logging, no analytics pixel watching your keystrokes, and no third-party API silently receiving a copy of your input. Closing the browser tab is the same as clearing your session. This is a deliberate design choice: too many free "online tools" quietly funnel user content through remote servers, and we do not think a utility as small as this one justifies that risk.
Speed is the other pillar. The Image Compressor loads on a cold connection in well under a second and stays responsive on older phones, low-power laptops, and metered mobile networks. There are no heavy frameworks layered on top of the tool, no autoplay video ads, and no blocking third-party scripts. Search engines like Google reward pages that load quickly and stay interactive, but more importantly, so do human visitors who came here to get one specific job done.
If the Image Compressor saves you time, the best thing you can do is bookmark this page and share it with a colleague or classmate who might need it. We also welcome direct feedback — bug reports, feature requests, and suggestions for entirely new tools all go to the same inbox and are read by a human. The best tools on ToolNest started life as a one-line reader email, and this page will keep improving as long as people keep telling us what they wish it did better.