Skip to main content
SprintBrain injects into every text field on every website. Whether you’re replying in Gmail, chatting in Slack, prompting an AI model, or updating a CRM record, the same trigger-and-expand flow works without any site-specific setup.

​
Where it works

​
Universal compatibility

SprintBrain works in every standard <input> field, <textarea>, and contenteditable element — which together cover the vast majority of text fields on the web. This includes:
  • Lexical-based editors (used by WhatsApp Web and others)
  • ProseMirror-based editors (used by Notion and many others)
  • Any other contenteditable rich-text surface

​
Field type compatibility

SprintBrain monitors the keystroke buffer in active text fields for your configured trigger. It works with:
Some heavily customized rich-text editors intercept the Tab key before SprintBrain can act. Use the right-click context menu or the extension popup as drop-in alternatives — both work on any page regardless of how the editor handles keyboard events.

​
Mobile

The SprintBrain library is fully accessible from any mobile browser at app.sprintbrain.com. On mobile you can:
  • Search your full snippet and prompt library
  • Fill dynamic form fields inline
  • Copy the finished, expanded text to your clipboard and paste it anywhere
There is no background injection on mobile — the Chrome extension only runs in desktop Chrome. The copy-from-browser flow gives you access to your entire library on any device without installing anything.

​
Context menu

Right-click any text field on any page to open a SprintBrain submenu that mirrors your folder structure. Language variants appear as a nested submenu so you can pick the right wording in one gesture. The context menu is especially useful when:
  • The Tab key is intercepted by the page before SprintBrain can act
  • You prefer browsing by folder rather than typing a trigger
  • You want to insert a snippet without touching the keyboard