# GridCraft Online Guide > Open-source spreadsheet powered by browser technology GridCraft Online Guide (https://gridcraft-online.cubeget.com) is a free guide about gridcraft online. ## Key Facts - Free to read, no sign-up - Independent site, not affiliated with the official project ## Sections - What is GridCraft? - How to Get Started with GridCraft - Key Features and Capabilities - GridCraft vs Excel vs Google Sheets - Step-by-Step Tutorial for Common Tasks - Integrating GridCraft into Your Workflow ## Frequently Asked Questions Q: Is GridCraft really free to use? A: Yes, GridCraft is fully open-source and free to use. As a clean-room implementation of spreadsheet functionality, it has no licensing costs or subscription fees. You can use it in personal or commercial projects, modify the source code, and self-host it on your own infrastructure without paying anything. Q: Can I use GridCraft directly in my browser without installing anything? A: GridCraft is primarily designed as a component library that developers can integrate into web applications. While it runs in the browser, you typically need to either use an existing deployment or set up your own instance. The official repository provides documentation on how to build and deploy GridCraft for browser use. Q: How does GridCraft compare to Excel and Google Sheets? A: GridCraft focuses on providing a lightweight, embeddable spreadsheet engine built with modern web technologies. Unlike Excel or Google Sheets, it's designed for developers to integrate into their own applications rather than as a standalone product. It offers core spreadsheet functionality like formulas, cell formatting, and data manipulation, but may not have all the advanced features of mature commercial products. Q: What file formats does GridCraft support? A: GridCraft's file format support depends on how it's implemented in your specific deployment. The open-source nature means developers can add import/export functionality for formats like CSV, Excel (.xlsx), or custom JSON structures. Check the documentation of your GridCraft instance or the official repository for current format support details. Q: Can I contribute to the GridCraft project? A: Yes, GridCraft is an open-source project on GitHub and welcomes contributions from the community. You can contribute by reporting bugs, submitting feature requests, improving documentation, or contributing code through pull requests. Visit the official repository to see contribution guidelines, review open issues, and connect with other developers working on the project.