About Image Compressor
Image Compressor is a free, browser-based tool for reducing the file size of JPG, PNG and WebP images. We built it because most online image compressors silently upload your files to a server, which is slower, less private, and unnecessary on modern web browsers that can do the same work locally.
What we do
We do one thing: compress images quickly and reliably, in the visitor's own browser, without uploading anything to a server. The tool runs in a Web Worker on your device, uses smart defaults tuned for the web (around 1MB output, 1920px long edge, quality 80), and gives you back a compressed file with no signup, no watermarks and no nags.
Alongside the tool we publish practical articles on image optimisation: format choice, Core Web Vitals, what compression settings actually mean, and how to make your website faster.
Why "in your browser" matters
Most online image tools take your file, send it to a server, process it there, and send it back. That introduces three problems: it's slow on a fast laptop with a slow connection, it costs the operator money so it's usually rationed (with watermarks, paywalls, or limits), and it puts your image on someone else's computer for some period of time.
Modern browsers can do the same work locally with no compromise in quality. Your images never leave your device, the tool is always free because there's no server cost, and the processing is faster because the file doesn't have to make a round trip across the internet.
Who runs this
Image Compressor is operated as an independent web project. We don't collect personal information, and we don't require an account to use the tool. The site is funded by display advertising, which lets us keep the core tool free for everyone.
Privacy first
Because compression happens in your browser, the images you upload never reach our servers. We don't see them, we can't access them, and we don't store them anywhere. When you close the page, the image is gone from our application entirely. For the broader policy on cookies, analytics and advertising, see our privacy policy.
Coming soon
We're working on bulk image compression — process dozens of files at once with higher upload limits — and additional output formats including AVIF. If you'd like early access or have a feature request, please get in touch via our contact page.
How to reach us
Questions, bug reports, suggestions, partnership enquiries — we read everything. The fastest way to get in touch is via the email address on our contact page.