The spreadsheet
GridCraft is made by the ArtCraft team and the GridCraft contributors and published at github.com/storytold/gridcraft. It is dual-licensed under the MIT License or the Apache License 2.0, at your option. Copyright © 2026 ArtCraft Team and the GridCraft contributors.
This site serves the official web build from each GitHub release without modification. The current build is v0.5.0; its zip matched the release’s published SHA-256 checksum (fbd9dbc48694676812c7bbca7f5f2e776cbc52c37d8f425a2dc033b5d23ce606). Every file is served byte for byte as it is in that zip. The only things left out are the sample header files for other web servers (_headers, .htaccess).
The app’s WebAssembly file (15.8 MB) is stored in Cloudflare R2 object storage and streamed from there, with the same bytes and the same name, as on every Craft site we run. The app’s own page preloads it with a Subresource Integrity hash, which you can compare with the file.
The licence texts ship with the build: LICENSE-MIT and LICENSE-APACHE, next to the project’s README and hosting notes. The project’s required notices are in its NOTICE file, and every bundled asset is listed in ATTRIBUTION.md. The release zip also carries three SIL Open Font License texts (BIZ UDPGothic, BIZ UDMincho, Shippori Mincho) from ArtCraft’s shared release packaging.
We are not affiliated with, sponsored by or endorsed by the ArtCraft team, Storyteller, or Microsoft. “ArtCraft” and its logos are trademarks of the ArtCraft Team, and this site does not use them. Microsoft and Excel are trademarks of Microsoft Corporation and are mentioned only to describe compatibility.
What we add
- The page around the spreadsheet: a top bar, links that open GridCraft’s sample workbooks, and a warning before you leave a tab with edits.
- The Spreadsheet AI panel, which runs in your browser on your own API key.
- These guides.
Screenshots
Product screenshots are from the GridCraft repository (docs/images/, MIT OR Apache-2.0). The project made them with GridCraft itself, using its own sample workbooks.
Report a problem
Bugs in the spreadsheet itself belong in the GridCraft issue tracker, which the GridCraft developers read. Please mention there that you used the web build. Problems with this site or the AI panel: contact@gridcraft.run.