Conversations & History
Claude saves your chats so you can return later. The sections below cover search, referring to earlier messages in a thread, and limits in long conversations.
Your conversation history
Every chat you start is saved in the sidebar, organized by date. You can return to any conversation, continue it, or search across your history to find something you discussed weeks ago.
Searching past conversations
As your chat history grows, scrolling becomes impractical. Claude's search lets you find conversations by keyword — matching both titles and message content.
Open the sidebar at claude.ai and click the search field (or use the search shortcut).
Type a keyword — a topic, filename, code snippet, or phrase you remember.
Browse matching results. Each result shows the chat title and a snippet of the matching message.
Click a result to open that conversation exactly where you left off.
Referencing earlier messages in a chat
Within a single conversation, Claude can see the entire message thread — every question, answer, file, and code block you exchanged. You do not need to repeat everything, but being explicit helps Claude focus on the right part.
Ways to reference earlier content
| Method | Example |
|---|---|
| Point back | "Using the schema I shared earlier, write a query…" |
| Quote directly | "You suggested using Redis for caching — expand on that approach." |
| Scroll and point | Scroll up in the chat, then say "see my message above about the API design" |
| Re-paste if needed | Copy an earlier code block and say "update this function to handle errors" |
Context window limits
Claude has a context window — a maximum amount of text it can consider at once. This includes your messages, Claude's replies, and any uploaded files in the current conversation.
In short conversations this is invisible. In very long ones — dozens of messages, large file uploads, or long threads — older content may be compressed or pushed out of active memory.
Signs it is time for a fresh chat
- Claude repeats questions you already answered
- Responses ignore constraints you set at the start
- The conversation has moved to a completely different topic
- You have exchanged 50+ messages or uploaded multiple large files
- Search your sidebar to find past conversations by keyword.
- Within a chat, reference earlier messages explicitly for best results.
- Very long conversations hit context window limits — older messages may be lost.
- Start a new chat or use a Project when context starts to degrade.
What's Next
Settings & Toggleable Features — web search, Deep Research, code execution, and memories.