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

# SprintBrain: Free AI Prompt Library and Text Expander

> SprintBrain turns your best text and AI prompts into reusable keyboard shortcuts — free for individuals and teams, no credit card required.

SprintBrain is a free Chrome extension and web dashboard that lets you store reusable text snippets, AI prompts, and calculation templates in one shared library, then expand any of them with a short trigger inside any text field on any website. This documentation covers everything from installing the extension to building dynamic snippets with live formulas, sharing folders with your team, and syncing your library with Notion.

## Key Features

<CardGroup cols={2}>
  <Card title="Text Expansion" icon="bolt" href="/install-extension">
    Type a trigger like `/hello` and press Tab to instantly expand a full template — in Gmail, Slack, ChatGPT, your CRM, or anywhere else you type.
  </Card>

  <Card title="AI Prompt Library" icon="brain" href="/prompts/overview">
    Keep your production prompts for ChatGPT, Claude, Gemini, and any other model in a searchable, versioned library with quality scoring and one-click fixes.
  </Card>

  <Card title="Dynamic Snippets and Formulas" icon="sliders" href="/snippets/dynamic-fields">
    Use `{{guest_name}}`, `{formtext:}`, `{formdate:}`, and `{formmenu:}` to collect values at insertion time. Live formulas calculate totals, discounts, and taxes the instant the template expands.
  </Card>

  <Card title="Free Team Sharing" icon="users" href="/team/sharing-and-permissions">
    Share a folder with your whole team or specific teammates at View, Edit, or Owner level — no paid plan, no per-seat pricing, and no re-onboarding.
  </Card>

  <Card title="Notion Sync" icon="rotate" href="/integrations/notion-sync">
    Connect a Notion database and SprintBrain mirrors it into your library automatically every five minutes, in both directions.
  </Card>

  <Card title="Snippet Triggers and Shortcuts" icon="keyboard" href="/snippets/overview">
    Choose your own trigger prefix so expansions never fire by accident in normal prose. Configure separate triggers for snippets and prompts.
  </Card>
</CardGroup>

## Who It's For

SprintBrain is built for anyone who types the same text twice and wants that time back. It is especially well-suited for:

* **Customer support and success teams** — standardize replies, macros, and canned responses so every teammate sends the approved wording. Shared folders replace private copies and ensure consistency from day one.
* **Sales and revenue teams** — send quotes with calculated pricing, auto-filled fields, and conditional sections that show or hide based on the deal details you enter.
* **Hospitality and property operators** — handle multilingual guest communication with multi-language snippet variants, gendered greetings that agree with the guest's name, and date math for check-in and checkout.
* **AI power users and prompt engineers** — maintain a versioned, shared prompt library scored on role, objective, context, examples, reasoning, and constraints. Filter by strategy (Chain of Thought, RAG, agentic) and by expected output (JSON, Markdown, SOP).
* **Recruiters, agencies, and consultants** — reuse outreach templates and follow-up sequences without maintaining private copies that drift out of date.
* **Anyone who reuses text** — if you have typed the same sentence more than once, SprintBrain turns it into a trigger.

## How Text Expansion Works

When you install the SprintBrain Chrome extension, a lightweight content script runs quietly on every page. It monitors the keystroke buffer in any focused text field, waiting to detect your configured trigger prefix. The moment you type a trigger — for example `/hello` — followed by Tab, the script replaces what you typed with the full expanded text. The original trigger characters disappear and the finished content takes their place, inline and instantly.

If the template contains dynamic fields, an overlay appears and asks for the values before inserting. If it contains live formulas, those are evaluated by a purpose-built parser the moment the template expands — there is no `eval` and no dynamic code execution, so a snippet can never run code in your browser.

Your library is cached locally in the browser for instant, offline-safe expansion. Cloud sync keeps your library up to date across devices and teammates in the background.

<Note>
  SprintBrain is **completely free**, including team sharing, Notion sync, and the full AI prompt library. No credit card is required to sign up, and there is no per-seat pricing for adding teammates. The entire product ships at no cost.
</Note>


## Related topics

- [AI Prompt Library: Store and Expand Prompts Anywhere](/prompts/overview.md)
- [SprintBrain Quickstart: Install, Sign In, and Expand](/quickstart.md)
- [Create and Structure AI Prompts with Prompt Blocks](/prompts/create-prompts.md)
- [Filter Prompts by Strategy, Intent, and Output Type](/prompts/filters-and-shortcuts.md)
- [Sites and Apps Where SprintBrain Expands Text](/integrations/supported-sites.md)