FastGrid & TreeGrid

High-Performance JavaScript Components for Enterprise Applications

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Display and edit millions of rows with instant response. Plan, analyze and work with data directly in your browser. CSP-ready. Excel-like. No pagination. Unlimited end users.

FastGRID

Ultra-Fast JavaScript Tree Grid for Big Data

A next-generation JavaScript data grid built for extreme performance. Handles millions of rows and hundreds of thousands of columns with smooth, virtual scrolling and no pagination. Designed for enterprise dashboards, analytics tools and large datasets.
Primary capabilities:
High-performance grid for large-scaled data
Virtual scrolling with zero blanking or scroll gaps
Instant sorting, filtering and cell editing
Ideal for replacing slow HTML tables or legacy grids
More about FastGrid

FastSHEET

Excel-Like JavaScript Spreadsheet

A high-performance excel-like JavaScript spreadsheet built on top of FastGrid. Combines cell-based editing, formulas, autofill and formatting with the speed required to process millions of rows.
Built for:
Financial models
BI tools
Complex calculations in the browser
More about FastSheet

GanttCHART

JavaScript Gantt Chart for Project Planning

A complete JavaScript Gantt chart component for task planning, dependencies, milestones and resources. A browser-based alternative to Microsoft Project or Oracle Primavera.
Features:
Dependencies & critical path
Resource assignments
Editable timeline & drag-drop
Large project support
More about GanttChart

TreeGRID

Enterprise JavaScript Data Grid & Tree Grid

A powerful JavaScript data grid and tree grid component for displaying, editing and managing both tabular and hierarchical data. Supports advanced editing, business logic, and visual customization for complex enterprise systems.

More about TreeGrid

SpreadSHEET

Open, Edit & Save XLSX Files Directly in the Browser

A web-based JavaScript spreadsheet that lets users open, edit and save XLSX files with no server-side processing. Ideal for secure environments thanks to full Content Security Policy (CSP) compliance. More about SpreadSheet

References

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News

2026-01-02
FastGrid minor version 2.1 released Added animations in row, column and cell changes and in hover and focus cursor.
Added new style Plain as simple white style without borders.
2025-12-10
FastGrid major version 2.0 released FastGrid styles extended, added new styles "Beige", "Green", "Blue" and "Black" and modified original style "White".
"Black" style modified and renamed to "Dark" and "Standard" style modified and renamed to "Gray".
FastGrid was updated and extended for better styling.
Added new optional base font "Open Sans" and FastGrid updated to support external base fonts.
2025-12-10
TreeGrid build 17.2.2 released Corrected a few bugs in 17.2.
2025-12-10
New web site released Our web has been completely re-styled and updated.
2025-10-26
TreeGrid minor version 17.2 released. Added some minor new features. Redesigned trial examples packages for both TreeGrid and FastGrid.
2025-06-12
New product FastGrid version 1.0 released. FastGrid is new grid & sheet widget that can display millions of rows and / or hundred thousand of columns without any paging, delays, blinking, empty spaces or scroll gap. The grid has very fast response regardless on the displayed row count.
FastGrid consists of FastGrid (similar to TreeGrid Grid) and FastSheet (similar to TreeGrid Sheet) components.
FastGrid is completely independent on TreeGrid, the products do not share any their part.
FastGrid is not any successor of TreeGrid, the products differ in their features and usage purposes. Both the products will be maintained, developed and extended in future.
FastGrid and TreeGrid are not compatible, their data format, settings and API remarkably differ.
Compare FastGrid 1.0 with TreeGrid 17.1.
2025-06-12
TreeGrid minor version 17.1 released. Added compatibility with FastGrid.
2024-06-21
TreeGrid major version 17.0 released. TreeGrid code rewritten to be compatible with Content Security Policy and no more requires unsafe-inline directive.
TreeGrid has been updated to work in third party online frameworks like SalesForce LWC.
Added various features for code and html isolation and to permit placing TreeGrid under shadow DOM.
See detailed news

Why FastGrid & TreeGrid

Extreme Performance

Optimized JavaScript rendering ensures smooth interaction even with millions of rows and complex structures.

Excel & Project Functionality in the Browser

One suite that covers grid, tree, spreadsheet, Gantt and chart components.

Full Security & CSP Compatibility

Works in Salesforce LWC, shadow DOM and strict CSP environments�no unsafe-inline required.

All Components, One Vendor

Unified licensing, consistent API, shared logic. No runtime fees. Unlimited end-user deployments.

Universal Data Engine

Display any dataset, structure or row-based visualization.

Fully extensible

Full JavaScript API with properties, methods and events.

Live Examples

FastGrid million rows example

FastGrid million rows example screenshot

Demonstration of a very large FastGrid (up to 3,000,000 rows) with features like column sets, tree, sorting, grouping, filtering, searching, calculations, resizing and moving columns, row dragging, adding, deleting, copying, selecting, fixed rows and columns, cell types and formats, calendar, printing, export to PDF and to MS Excel.

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TreeGrid universal example

TreeGrid universal example screenshot

Demonstration of many TreeGrid features like tree, sorting, grouping, filtering, searching, calculations, resizing and moving columns, row dragging, adding, deleting, copying, selecting, fixed rows and columns, many cell types, formatting values, popup default list, calendar, printing, export to PDF, export to MS Excel.

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FastGrid large pivot example

FastGrid large pivot example screenshot

Demonstration of a large grid up to 2,000,000 rows showing pivot grid creation with features like sorting, grouping, filtering, searching, calculations, resizing and moving columns, row dragging, adding, deleting, copying, selecting, fixed rows and columns, sticky rows, cell types and formats, printing, export to PDF and to MS Excel.

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Gantt chart & Network diagram

Gantt chart & Network diagram screenshot

Demonstration of TreeGrid application showing interactive Gantt chart (task schedule, resources, dependencies) and network diagram with descriptions and dependencies, including printing and export to PDF.

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FastGrid Excel example

FastGrid Excel example screenshot

Demonstration of a cell-based spreadsheet program showing editable formulas with suggestions, row and column index, auto adding new rows and columns on scroll, editable cell style, dynamic and automatic cell format and type, copy & paste values and styles and auto fill values and styles.

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Universal interactive bar chart

Universal interactive bar chart screenshot

Demonstration of interactive bar chart with different sizes, style, shape, icons, color, HTML content, tooltip and features. Shows creating, deleting, moving, copying, selecting and changing boxes with dependency lines.

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