all-docs

"All Docs" is a tool that enables online previewing, storage, and sharing of documents such as Word, Excel, PowerPoint, PDF, and images (Pic). It supports full-text search for all document information. “”(All Docs)，Word, Excel, PPT, PDF, Pic、、，。demo：admin123. Maintained by Jarrettluo on GitHub, where it has earned 641 stars from the community.

It's actively developed around document, document-preview, elasticsearch, and is a solid reference for anyone building with these tools.