Claude's Mini-Apps Now Save Your Data Between Sessions

Artifacts, the interactive apps, charts, games, and tools that Claude creates inside conversations, can now store data across sessions. Previously, everything built inside Claude vanished when you closed the chat. Now, on Pro, Max, Team, and Enterprise plans, artifacts can save up to 20 MB per artifact, and that data persists when you return the next day or next week.

What This Changes

Build a daily mood tracker with Claude. Log entries for Monday, Tuesday, Wednesday. Close the browser. Come back Thursday, your data is still there. The same applies to budget trackers, vocabulary flashcards, workout logs, habit journals, game leaderboards, and to-do lists. Persistent storage transforms these from throwaway demos into real tools people use daily.

Even more powerful: artifacts can now call Claude's own API internally. A mini-app built inside Claude can use AI to analyze data, generate summaries, or make decisions.

The "Publish" Button

Anthropic also added a Publish Artifact feature. Users can share their creations with others via a simple link. The recipient does not need a Claude account. A community catalog lets users browse artifacts that others have built and published. This turns Claude into something resembling a zero-code app development platform.

What Are Artifacts?

Artifacts launched in June 2024 as a way for Claude to produce interactive content, code previews, React components, SVG graphics, HTML pages, alongside its text responses. The addition of persistent storage in 2026 transforms artifacts from demonstration tools into genuine applications.