SpreadJS v18.1 is Here!

Learn More About the v18.1 Release of SpreadJS

We are excited to announce the release of SpreadJS v18.1 (Service Pack 1)! This release includes several exciting new features and enhancements of our JavaScript spreadsheet and the optional add-ons, including:

NEW! Developer Preview of the Upcoming AI-Assistant Add-On
Command Palette in Designer for Quick Access to Formatting, Layout, & Data Tools
Support to Drag, Stack, and Dock Designer Ribbon Component Add-On Panels
Enhanced PivotTable Performance with New Field Formatting Controls
Full Support for Angular 19
New Worksheet Tab Styling & Background Images
Spreadsheet Collaboration Add-On Developer Preview
Excel-Compatible TRIMRANGE & REGEX Functions
And Much More!

Explore these and more in our release blog or read below for a few highlights.

Download the Latest Version

Release Feature Highlights

Workbook & Calculation Engine Enhancements

Angular 19 Support
Worksheet Background Image - Enables a full-sheet image for branding, watermarking, or instructional overlays.
New TRIMRANGE and REGEX Functions - Excel-compatible functions for cleaner, smarter data handling.
Bubble Chart Bubble Scale - Improved bubble scaling visuals and control for data-heavy charting.

Designer Ribbon Component Add-On Enhancements

Reduced File Size - 30 %+ reduction in JS/CSS file size for faster load times.
Dockable Side Panels - Drag, stack, and dock Designer panels for a more flexible workspace.
Command Palette - Quickly access formatting, layout, and data tools with Ctrl/Cmd + P.

PREVIEW! AI Add-On

We are excited to introduce the Developer Preview of our upcoming AI Add-On! This beta component brings natural language intelligence to your JavaScript spreadsheets. Instantly generate formulas, create PivotTables, and analyze data using simple text prompts—all without writing complex code. Learn More.

PREVIEW! Collaboration Add-On

We are excited to re-highlight the advanced Developer Preview of our upcoming Collaboration Add-on! These beta server-side components facilitate real-time collaboration and editing within a SpreadJS workbook and enables developers to implement features like auto-saving and version control to help create their own proprietary collaboration platforms. Learn More.

Read the Full Release Blog

Additional Resources

Demos

Documentation