The Keplar One extension puts Keplar in your browser's toolbar and right-click menu. It works in Chrome and Edge (version 116 or newer).
What you need
- A Keplar API key, made in Keplar under Account, then Developer API. On the paid plans (Lite and above) the extension uses your plan's models. A Free key works too, with free models only and tight limits: a couple of questions a minute and a few dozen a day.
- Each question spends the same credits as a question in the Keplar app.
Steps
The extension has been submitted to the Chrome Web Store and is waiting for Google's review. Once it is listed, install it from the store with one click. Until then, testers who have the extension zip can load it by hand:
- Unzip the extension into a folder you will keep.
- Open
chrome://extensions(in Edge,edge://extensions) and turn on Developer mode. - Press Load unpacked and choose the folder.
Add your key
- In Keplar, open Account, then Developer API, and create a key with the
askscope. It is shown once, so copy it straight away. - Click the Keplar One button in the toolbar, paste the key and press Save key.
The key stays in the extension's own storage on this device. Press Remove key in the popup to delete it, and revoke the key in Account to cut off access everywhere at once.
Ask about a page
- Click the toolbar button, type a question, and optionally press Add selected text or Add page text.
- Or right-click selected text and choose "Ask Keplar One about" it, or right-click a page and choose "Ask Keplar One about this page".
The answer shows how many models agreed, the formatted answer and, when the models split, where they differed. For anything on the page you can point at, including pictures, use Search with Keplar One.
When it can't read a page
No extension can read the browser's own pages, such as settings or the web store. On those pages, type the question yourself.
Related
- Search with Keplar One (drag to search a page): Drag over any part of a web page, text or picture, and get one answer from several AI models in a side panel, then ask follow-ups, translate or copy.
- Browser extension privacy and permissions: Exactly what the Keplar One extension reads, what it sends to Keplar and when, what it keeps on your device, and why it asks for each browser permission.
- Developers and API status: What Keplar offers developers today (and what it does not): a beta API with keys on paid plans, outbound MCP connections, a shareable answer format, and what is still missing.