You will get custom Excel Add-in with Office.js & Microsoft 365
Top Rated
Project details
I specialize exclusively in Microsoft 365 Add-in development with 5+ years of Office.js experience. Every Add-in I deliver is production-ready, works on Excel Web and Desktop, follows Microsoft best practices, and includes full source code. I don't build generic web apps — I build Excel Add-ins that solve real business workflows and integrate with your existing systems, APIs, and databases. Top Rated | 100% Job Success.
Programming Languages
HTML & CSS, JavaScript, TypeScriptCoding Expertise
Cross Browser & Device Compatibility, Localization, SecurityWhat's included
| Service Tiers |
Starter
$250
|
Standard
$600
|
Advanced
$1,000
|
|---|---|---|---|
| Delivery Time | 4 days | 8 days | 14 days |
Number of Revisions | 1 | 3 | 7 |
Number of Pages | 2 | 5 | 7 |
Design Customization | |||
Content Upload | |||
Responsive Design | |||
Source Code |
Frequently asked questions
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About Zia Ul
Microsoft 365 Add-ins | Outlook, Excel & Word | Office.js | Graph API
96%
Job Success
Sargodha, Pakistan - 6:11 pm local time
I am a specialist Microsoft 365 Add-in Developer with 4+ years focused exclusively on Office.js, VSTO, and Google Workspace Add-ons. I do not build generic web apps; every project I take is an Office or Workspace automation solution built for real business workflows.
✦ Outlook Add-in Development
AI email summaries, auto-replies, and priority tagging CRM sync with Salesforce, HubSpot, and Dynamics 365 phishing detection and compliance tools, calendar automation and scheduling assistants, all built with Office.js and VSTO, production-ready and enterprise-compliant.
✦ Excel Add-in Development
Live API data sync, automated dashboards, custom Office.js functions, AI-powered analysis, and enterprise Excel automation for both Web and Desktop, replacing slow manual workflows with reliable, scalable solutions.
✦ Word Add-in Development
Automated document generation, contract and proposal assembly, AI proofreading, redlining and approval workflows, and compliance enforcement, turning Word into a document automation engine.
✦ PowerPoint Add-in Development
Data-driven slide generation, brand and template enforcement, automated investor decks and sales presentations built with Office.js for Web and Desktop.
✦ Google Workspace Add-on Development
Gmail automation and email parsing, Google Sheets custom sidebars and dashboards, Docs content automation, and secure internal workflow tools built with Google Apps Script and modern APIs.
✦ Microsoft Graph API & M365 Integration
Cross-app workflows connecting Excel, Outlook, Word, SharePoint, and Teams Microsoft Graph API integrations, SSO authentication with MSAL, Azure AD, centralized deployment, and AppSource-ready add-in packaging.
✦ Tech Stack
Office.js · VSTO · Microsoft Graph API · React · TypeScript · Fluent UI · Node.js · .NET Core · Azure · OpenAI API · Google Workspace APIs · Salesforce API · REST APIs
Steps for completing your project
After purchasing the project, send requirements so Zia Ul can start the project.
Delivery time starts when Zia Ul receives requirements from you.
Zia Ul works on your project following the steps below.
Revisions may occur after the delivery date.
Requirements & Kickoff
Review requirements, confirm Excel version, API details, and project scope before development starts.
Planning & Architecture
Define Add-in structure, UI layout, API endpoints, and auth method. Share plan with client for approval.