No Downloads, No Uploads
Redefine Web Office
Powered by OnlyOffice and WebAssembly, turning your browser into a full-featured Office suite. All files processed locally for complete privacy and lightning-fast performance.
Why Choose Web Office?
Break free from traditional office software constraints. Editing and collaboration made lightweight and secure.
Zero Upload, Local Processing
Files never leave your device. All editing and preview operations happen in the browser's secure sandbox, ensuring complete privacy.
Ready to Use Instantly
No need to install heavy Office software or create an account. Open the web page and start working with Word, Excel, and PowerPoint files.
Perfect Compatibility
Built on OnlyOffice core, fully supporting .docx, .xlsx, .pptx and more. No layout issues, no lost formatting.
PDF Editing & Preview
View and edit PDF documents directly in your browser. Annotate, fill forms, and export Office files to high-quality PDF.
Cross-Platform
Works on any device with a modern browser - Windows, Mac, Linux, or mobile. Your office is wherever you are.
100% Open Source
Transparent code, community-driven. Deploy on your own infrastructure for complete data sovereignty.
Full Format Support, PDF Included
Edit and preview all major Office formats plus PDF documents. Click any format below to create a new document instantly.
Built with Modern
Web Technologies
We compile the OnlyOffice C++ core using WebAssembly to run natively in your browser. This means fast, responsive editing even with large spreadsheets and complex documents—powered by the same engine as desktop applications.
All computation happens on your device for speed and privacy.
Read and write local files directly with modern browser APIs.
Open Office Files Right from Chrome
Open, view and edit Word, Excel and PowerPoint files in your browser. Whether it's a DOCX email attachment, an XLSX report, or a PPTX presentation, ZIZIYI Office handles it all—no installation, no upload, no login. Supports docx, xlsx, pptx, csv, odt, rtf and more.
Add to Chrome