Old forum software becomes a security risk, and switching platforms can modernize a community. A careless migration can also break years of links and confuse members. Plan it like a project.
Most major platforms provide import tools or converters for common sources. phpBB has converters for some older packages (see the phpBB Knowledge Base), and Discourse publishes import scripts for many platforms, discussed on Discourse Meta. Check what each converter moves: members, password hashes (or whether members must reset passwords), posts, attachments, private messages and permissions.
Take a full database and file backup of the old forum, and keep it. See how to back up your forum.
Run the conversion on a staging site. Check formatting (BBCode, quotes, embedded media), attachments, user groups and permissions. Fix the problems and run it again. Repeat until it's clean.
Old thread URLs are in search results and linked from other sites. Map old URLs to new ones and set up permanent (301) redirects. Google's guidance on Google: site moves with URL changes explains how to keep search signals during a move. Then submit the new sitemap.
Watch for 404 errors and crawl errors in Search Console. Collect member feedback in a dedicated thread, and fix broken redirects quickly.
Related: best free forum software · software requirements · forum SEO basics
Published October 25, 2026. Some links may be affiliate links; see our Affiliate Disclosure.