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Security Considerations

Client-Side Processing

All document preview happens entirely in your browser. When you upload a file:

  • The file is read using the browser's FileReader API
  • Content is passed directly to the vue-office renderer
  • No file data is sent to any server

URL-Based Preview

When previewing via URL:

  • Your browser fetches the document directly from the remote server
  • The remote server can log your IP address and request metadata
  • Only use URLs from sources you trust

Sensitive Documents

For confidential or sensitive documents:

  • Prefer local file upload over public URLs
  • Clear history after previewing sensitive files
  • Close the browser tab when finished

Third-Party Library

This tool uses the open-source vue-office library. Review the library's source code and license if you have compliance requirements.

No Server Storage

  • History is stored in browser local storage only
  • Clearing browser data removes all history entries
  • No account or cloud sync is involved

Recommendations

  1. Do not preview classified documents on shared computers
  2. Verify document sources before opening URLs
  3. Use HTTPS URLs when possible
  4. Clear history after working with sensitive files
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