TinyPNG

An online image compression tool reduces PNG and JPEG file sizes without noticeable quality loss, solving the universal problem of oversized images slowing down websites. The founder turned a straightforward single-purpose utility into a thriving SaaS business by pairing strong SEO with a freemium model that lets users compress a limited number of images for free before upgrading. The site attracts 4.5 million visits per month and generates an estimated $7.4 million in annual revenue from premium subscriptions, proving that a well-executed tool solving one clear pain point can scale remarkably well.