Confluence stores all page data in Confluence's wiki markup syntax.

Importing Wiki Content

For other instances of Confluence:

• If the versions are the same, export the space from the originating instance and import into Confluence.
• If the versions are different, you can use an intermediate server to migrate versions.

This is ideal because page history, attachments, and wiki markup will be preserved and you'll be able to do multiple pages at once. The drawbacks are that it may be inconvenient if the versions differ and you must not have a duplicate space key on the destination instance (you cannot import a space that already exists, and this is defined by the space key).

For other wikis:

• Check if the Universal Wiki Converter can import it.

Importing Non-wiki Content

Importing non-wiki markup into Confluence requires a conversion process.

• Text with basic formatting can be pasted directly into the Rich Text Editor. This includes simple Word documents or web pages.
• Files such as Microsoft Word and Excel documents can be imported using a Content Converter
• Confluence pages saved to disk can be Imported From Disk

For web content:

• Convert a HTML file to a Confluence page using the HTML To Confluence Converter
• Embed an external web page into Confluence with the Html-include Macro
• Use HTML code in a page with the HTML Macro