Overview

• Text attachments are live and open in an expanded view on mobile or a dedicated window on threads.com.
• Users get basic formatting including bold, italics, underline, strikethrough, and emojis in a simple editor.
• Links included in the main post surface prominently at the end of the attachment to boost off-platform traffic.
• At launch, attachments cannot embed media, are not federated to ActivityPub services, and are not indexed by search engines.
• Meta says the feature is free with no monetization planned and will gain richer formatting and potential federation, positioning it against X’s paid long-form posts.