tablsxPredictable XLSX data interchange for Node.js

Read and write Excel workbooks using a small normalized JavaScript model.

Small public API

The package exposes a single normalized workbook model plus focused helpers for reading, writing, tabular conversion, builders, and readers.

Data pipeline friendly

Work with arrays, row objects, dates, formulas, empty cells, and numeric vectors without adopting a spreadsheet UI abstraction.

Explicit behavior

The docs link directly to design rules and ADRs so consumers and contributors can understand the intended semantics.

Why tablsx

tablsx is designed for programs that treat .xlsx files as data exchange artifacts rather than interactive spreadsheets. The package keeps the model small, predictable, and easy to inspect.

Documentation map

Start with Getting Started for installation and a first round-trip example.
Use Choosing an API to decide between plain functions, builders, and readers.
Use Reading Workbooks and Writing Workbooks for direct buffer-based APIs.
Use Tabular Workflows when your data starts as arrays of objects.
Use Builder API for fluent workbook construction.
Use Reader API for navigable, read-only access to parsed workbooks.
Use Reference for the full exported surface.