Export your Jira issues in XML Format
In a given JIRA project:
Create a view or filter that shows all the tickets.
Click Export > XML.
Preview the source of the page and save it.
Import XML into Assembla
In a given Assembla space:
Navigate to Tickets → Settings → Export & Import (first add the Tickets tool in Admin → Tools if you don’t already have it installed)
Browse your XML file exported from Jira in Import tickets from
Click on Import from Jira
To import your ticket attachments, browse your .zip file
Click on the "Import Tickets" button
Need help? Please contact us at firstname.lastname@example.org.