What is an XLAM file in Google Sheets terms?
An XLAM file is an Excel add-in workbook that stores macros and custom functions. Google Sheets has no XLAM format; distribute logic as an Apps Script project, library, or published add-on. Import the XLSX data separately, then rebuild automation in Apps Script.
When to use it
Use this mapping when a vendor ships an XLAM and you need the Sheets install pattern.
When to skip it
Skip rebuilding the add-in when you only need the static tables inside the file.
Better Sheets resources
Related blog posts
Guides that explain XLAM in more depth.
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Excel add-in
Excel add-ins extend desktop Excel, often as XLAM or COM packages. Google Sheets uses Workspace Marketplace add-ons and Apps Script instead, installed per user or domain. Cloud add-ons cannot access your local disk like some Excel add-ins.
Read guide →Google Apps Script
Apps Script is Google's JavaScript platform for automating Sheets and other Workspace apps. From a spreadsheet you can open Extensions > Apps Script to write code that reads cells, sends email, builds menus, and runs on triggers. It goes beyond formulas when you need custom workflows tied to your file.
Read guide →Apps Script library
An Apps Script library is a shared script project you attach to other projects by script ID. Instead of copy-pasting the same utility functions into fifty workbooks, you publish one library and call LibraryName.doSomething() from each bound sheet. Libraries help teams standardize CRM helpers, API wrappers, and formatting tools.
Read guide →Google Workspace Marketplace for Sheets add-ons
The Google Workspace Marketplace is Google's directory where users discover and install Sheets add-ons and other Workspace extensions. Developers publish a listing with description, screenshots, privacy policy, and OAuth scopes; Google reviews the app before it appears in Install flows inside Sheets and admin consoles.
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