PDF vs Markdown vs HTML vs TXT - Best Format in 2025

In 2025, AI has become the world’s most powerful generator of new knowledge—shaping how we write, plan, research, design, analyze, and make decisions. But there is one factor that determines whether this intelligence becomes a lasting asset or disappears the moment the tab closes: the format you export it into. The format defines the future usefulness of your ideas. It decides whether your insights can be searched, organized, referenced, shared, integrated into workflows, or reused as part of a growing personal knowledge system. A clean, structured export turns an AI conversation into a durable piece of intellectual capital. A broken, poorly formatted export—missing images, collapsed lists, lost tables, or flattened reasoning—turns valuable knowledge into noise. This is why choosing between PDF, Markdown, HTML, and TXT is not a technical choice; it’s a strategic one. And it’s why ChatExport was designed to preserve AI-generated content with precision, privacy, and structure—so the knowledge you create today remains usable tomorrow.