99Tools is a free Chrome extension that offers over 800 online tools tailored for developers, SEO experts, and content creators. This add-on enhances productivity by providing instant access to a wide range of utilities directly in the browser sidebar. Users can easily save their favorite tools and access recent tasks, ensuring a streamlined workflow. The extension prioritizes user privacy, with no data collection, allowing for secure usage.

The toolset is categorized into 35+ sections, covering areas such as developer tools, web design utilities, text formatting, mathematical calculations, and SEO resources. Each category includes specialized tools like JSON handlers, CSS generators, and various calculators. With its lightning-fast search capabilities, 99Tools makes finding the right tool quick and efficient, making it an essential resource for professionals looking to enhance their online productivity.