MathVoice for Microsoft Word
An Office Add-in that lets you create and edit math equations by voice, directly inside Microsoft Word on Desktop, iPad, and Online.
What this extension does
MathVoice for Word is an Office Task Pane Add-in that adds a sidebar panel to Word. From the panel you can:
- Speak equations — use your microphone to dictate LaTeX edits naturally
- Type equations — full LaTeX editing with the MathVoice Studio
- Insert equations — LaTeX is converted to native Word OMML equations inserted at the cursor
- Load equations from the document — select any equation in your document and load it into the editor for re-editing
Equations are inserted as native Word equations (OMML format), fully editable with Word’s built-in equation editor. The conversion chain is: LaTeX → MathML → OMML, performed entirely in-browser — no server round-trip for insertion.
How it works
- Open Word → Insert → Add-ins → MathVoice
- The task pane appears with the MathVoice Studio editor
- Speak or type your equation
- Click Insert to place a native equation at your cursor
- Select an existing equation and click Load from document to re-edit
Data and permissions — full transparency
| Permission | Scope | Purpose |
|---|---|---|
| Read and write document | Current document | Required to insert equations at the cursor and read existing equations for re-editing. Uses Office.js Common API (getSelectedDataAsync) and Word.js for OOXML insertion. Only the current selection and paragraph are accessed — never the full document body. |
| Microphone (browser) | Task pane only | Used by the embedded Studio for speech recognition. Audio is processed by the browser’s speech engine (Web Speech API). Audio never leaves the browser unless the optional Whisper backend is enabled — only the text transcript is sent to the intent API. |
| Network to mathvoice.app | Studio + intent API | The task pane loads Studio from mathvoice.app. LaTeX strings are sent to the intent API to process voice/text edits. Formula data is processed in transit and not stored. |
No document contents are stored. Equation LaTeX is sent to the API only during active editing. The add-in reads equations from your document only when you click “Load”. See our Privacy Policy for full details.
Requirements
- Microsoft Word 2016+ (Desktop), Word for iPad, or Word Online
- Microsoft account or Microsoft 365 subscription
- Modern browser engine (Chromium, WebKit, or Firefox)
- Microphone (for voice input; keyboard input always works)