Free Alternatives to Microsoft Office (No Google Account Needed)

If you don't own Microsoft Office and want to open .docx or .xlsx files (Word/Excel formats),
here are some free, safe, and highly compatible tools for Windows, macOS, Linux, and mobile:

1. LibreOffice (Recommended)
- Open-source and offline suite compatible with Word, Excel, PowerPoint
- Export to PDF with strong formatting retention
- Website: https://www.libreoffice.org/
- You may need to change the settings into Light mode and restart LibreOffice to view documents on a white page. 

How to turn on Light mode:
a. Open LibreOffice and go to Tools -> Options -> LibreOffice -> Appearance.
b. Under the Appearance settings, change the theme from System to Light.
c. Click OK or Apply to save the changes.

2. OnlyOffice
- Modern interface, high compatibility with MS Office files
- Great for both personal and collaborative use
- Website: https://www.onlyoffice.com/en/desktop.aspx

3. WPS Office (Free with limited ads)
- Lightweight and mobile-friendly
- Supports .docx, .xlsx, .pptx
- Website: https://www.wps.com/

4. Collabora Office (Mobile)
- Best for opening/editing Office files on Android or iOS devices
- Based on LibreOffice
- Website: https://www.collaboraoffice.com/download/

Tip:
To export any .docx to PDF with full visual formatting, use LibreOffice or OnlyOffice.
They preserve spacing, headings, and visuals much better than online converters.

