GridSheet is a programmable spreadsheet engine for developers. The formula engine is built from scratch, giving full control over extensibility and licensing. It supports async functions with caching and Google Sheets-like spill behavior. Function and argument help is also available. You can customize rendering and clipboard behavior via policies. It works with React, Preact, Vue, and Svelte, and runs in plain JavaScript without build tools.

Wispr Flow: Dictation That Works Everywhere — Stop typing. Start speaking. 4x faster.

Stop typing. Start speaking. 4x faster.

Hi everyone 👋 I built GridSheet because I couldn’t find a spreadsheet library that fit my own needs. I focused on making it simple yet powerful and highly customizable so it can adapt to a wide range of use cases — from embedding it as a part of a page to connecting multiple sheets with formulas. The feature set has also grown over time as I kept using and improving it. It includes async functions with caching, enabling external data fetching — especially LLM-powered functions, which are essential in modern web apps — along with spill behavior and a formula engine built from scratch for better extensibility. It’s open source and free for commercial use, so feel free to try it out. I’d love to hear your feedback or how you might use it!

Wispr Flow: Dictation That Works Everywhere — Stop typing. Start speaking. 4x faster.

Stop typing. Start speaking. 4x faster.

GridSheet

Programmable spreadsheet engine with async, cache & spill

Programmable spreadsheet engine with async, cache & spill