Page Summarizer

Unlike extension-based summarizers that bundle their own paid credits, Page Summarizer is deliberately bring-your-own-key: you supply an OpenAI API key and the extension sends requests on your behalf. That keeps the tool free to install, puts you in control of model choice and spending, and means the code behind it can be audited — it is published under the MIT licence on GitHub.

Its feature set is built around flexibility rather than a single one-click button. You summarise whole pages, selected passages, or PDFs, and you can also use a custom prompt to fill out text fields such as an email or a form response. Profiles let you save different instruction sets — for instance, a "news" profile versus a "social" profile — so the same page can be summarised in the style each context needs, and you can drag and drop to reorder the ones you use most.

Model support is deliberately broad: you can pick from the OpenAI models available to your account, including reasoning models, so the extension keeps working as new generations are released. A dark mode follows your operating system theme. The developer states that the extension does not collect or use your data, which is consistent with the bring-your-own-key design — your API credentials stay in your browser.