Create a Fast, Accessible AI Spell Checker for Any Website

Register Ctrl Shift S, or another unused command, in the extension manifest. Send the command to the active tab and provide a clear error announcement when the current page or field cannot be edited.

Capture the value and selection from the focused input, textarea, or contenteditable element. Store the element and cursor position so the result can return to the same place without forcing the user to navigate again.

Send only the active text and a narrow correction instruction to the model. Require plain text output and forbid rephrasing, word substitutions, tone changes, or added content.

Replace the original value in the same field, preserve the cursor or selection when practical, and dispatch the input and change events needed by the page. Keep focus in the editor so the message is ready to send.

Add an ARIA live region that announces when checking starts, when it finishes, when no changes were needed, and when an error occurs. Joe heard processing spell check followed by spell check complete without leaving the field.