Checkget

Checkget is built around a single idea: you should not have to leave the page you are reading to use a large language model. Once the extension is installed, the Cmd+K (Mac) or Alt+K (Windows) shortcut opens a prompt panel on top of the current website, so emails, docs, support tickets and code files all become places where you can ask for help. The team markets it as an "intelligent browser assistant" and the emphasis is on the shortcut and the automatic recognition of what you are looking at, rather than on a separate dashboard.

The feature set covers the usual assistant chores: composing and replying to emails, improving writing, fixing spelling and grammar, making text longer or shorter, changing tone, summarizing content, translating, and explaining or optimizing code. Checkget says its AI can recognize the scenario automatically, so the suggestion it offers after you select text adapts to whether you are answering an email or reading a function definition. A dark theme is included for people who keep the panel open all day.

Checkget is a commercial product with a free tier and three paid plans, billed monthly or yearly through Stripe. There is also a privacy story attached: the service says traffic is encrypted, and for users who prefer not to route text through Checkget at all, a local mode lets them paste their own OpenAI API key so the extension communicates directly with ChatGPT.