Getting Started with Office Add-ins: A Developer's Guide
Learn the fundamentals of building Microsoft Office Add-ins with Office.js, from project setup to deployment and AppSource publishing.
Read morePowerful Microsoft Excel Add-in
Custom solutions for Excel, Word, Outlook, PowerPoint & Teams.
Automate workflows, boost productivity, and integrate with your business tools.
Featured Services
Authentication & Identity
Secure and scalable authentication services including SSO, OAuth, MFA, and role-based access control for web and enterprise applications.
Get it todayExcel Add-ins Development
Custom Excel add-ins built with Office.js to automate workflows and boost productivity.
Get it todayWord Add-ins Development
Enhance Microsoft Word with custom add-ins for document automation.
Get it todayFrom the Blog
Excel Add-ins: Automate Data and Workflows with Office.js
How to build Excel add-ins that automate data entry, analysis, and reporting using Office.js and the Excel JavaScript API.
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Microsoft SSO and Azure AD in Office Add-ins
Implement Single Sign-On and Azure AD authentication in your Office Add-ins for a seamless, secure user experience.
Read moreOffice Add-ins: The Future of Workflow Automation
Explore the latest trends and innovations in Office Add-ins, from AI-powered automation to seamless integration with Microsoft 365.
Read moreHow we build for Microsoft 365
A structured, compliant, and performance-focused development lifecycle aligned with Microsoft AppSource standards.
STEP 01
Planning & Analysis
Gathering stakeholder requirements and defining scope against Office JS API capabilities.
STEP 02
Architectural Design
Designing Task Pane interfaces using Fluent UI components for a native Microsoft experience.
STEP 03
Development
Iterative coding of manifests and web logic with real-time Office sideloading tests.
STEP 04
QA & Security
Rigorous bug identification and validation against Microsoft security standards.
STEP 05
Deployment
Global rollout via AppSource or centralized tenant deployment via M365 Admin Center.
STEP 06
Maintenance
Ongoing monitoring and compatibility updates for new Microsoft 365 releases.
FAQ
Do you build VSTO and Office.js add‑ins?
Yes. I build modern Office.js add‑ins and maintain/extend legacy VSTO/COM solutions, including migration paths.
Can you integrate Microsoft Graph and webhooks?
Absolutely—OAuth, SSO, Graph data, subscriptions/webhooks, and backend services are common parts of my projects.
How do deployments work?
I support centralized deployment to your tenant and AppSource submissions, with CI/CD, validation, and documentation.
Let's talk about your add‑in
Send a quick message with your goals, target Office app, and any API dependencies. I'll respond with next steps and options.