> ## Documentation Index
> Fetch the complete documentation index at: https://docs.fibonax.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Where SprintBrain works

> Snippets expand in text fields on websites you open in Chrome. Here's what's covered, and what to do where typing doesn't work.

The SprintBrain extension works in Google Chrome on a computer, and in other browsers that install extensions from the Chrome Web Store.

## Fields it works in

* Single-line boxes: text, search, email, web address and phone number fields.
* Larger text areas.
* Rich editors, the kind used by email, chat and AI tools, where you can format text.

No setup per site is needed.

## Where it can't run

Chrome doesn't let extensions into some pages: Chrome's own settings pages, the Chrome Web Store, and PDFs opened in the browser. It also can't reach apps outside the browser.

## When typing doesn't work

If a site blocks typed expansion, you have two ways around it:

* **Right-click menu**: right-click in the field and open **Insert SprintBrain snippet**.
* **The popup**: click the SprintBrain icon, open the snippet, fill it in and click **Copy filled**, then paste.

See [Ways to insert](/text-snippets/insert).

## On your phone

The extension doesn't run on phones. Open [app.sprintbrain.com/mobile](https://app.sprintbrain.com/mobile/) to search, fill and copy snippets, then paste them into any app. See [Mobile](/apps/mobile).


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