Claude Code Session Viewer

View, search, and export Claude Code session transcripts (.jsonl) online. Parse messages, filter by role, and export to Markdown, Word, or PDF — all in your browser.

Upload Claude Code Session File

Drag & drop your .jsonl session file here, or click to browse

Claude Code stores session transcripts as JSONL files. Each line is one message. All processing happens in your browser — your data never leaves your device.

Where to find your session files?

Claude Code stores sessions in your project's .claude/sessions/ directory
Or run claude --export-session to export the current session
You can also drag any JSONL file with Anthropic Messages API format

How to Use

Upload your Claude Code .jsonl session file (drag & drop or click to browse)
The file is parsed instantly in your browser — no data is ever uploaded
Browse messages with role badges (User, Assistant, System, Tool)
Filter by role to focus on specific parts of the conversation
Export the full session as Markdown (.md), HTML, Word (.docx), or PDF

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Frequently Asked Questions

What is a Claude Code .jsonl session file?

Claude Code stores conversation transcripts as JSONL files (one JSON object per line) in your project's .claude/sessions/ directory. Each line represents a message, tool call, or system event from your coding session.

Is my session data secure?

Absolutely. All parsing and processing happens in your browser using JavaScript. Your session files are never uploaded to any server — they stay entirely on your device.

What export formats are supported?

You can export your session as: Markdown (.md) for documentation, HTML for web viewing, Word (.docx) for reports, or PDF via your browser's print dialog. All exports preserve the conversation structure with role labels and timestamps.

Can I view tool calls and results?

Yes! The viewer automatically detects tool_use and tool_result blocks in Claude's Messages API format. Tool inputs and outputs are displayed in expandable sections for easy inspection.

What if my file can't be parsed?

Make sure your file is valid JSONL — each line should be a complete JSON object. Claude Code's native session format and the Anthropic Messages API format are both supported. If you see an error, check that the file isn't corrupted or truncated.

How to Use

Upload your Claude Code .jsonl session file (drag & drop or click to browse)

The file is parsed instantly in your browser — no data is ever uploaded

Browse messages with role badges (User, Assistant, System, Tool)

Filter by role to focus on specific parts of the conversation

Export the full session as Markdown (.md), HTML, Word (.docx), or PDF

Frequently Asked Questions

What is a Claude Code .jsonl session file?

Is my session data secure?

Absolutely. All parsing and processing happens in your browser using JavaScript. Your session files are never uploaded to any server — they stay entirely on your device.

What export formats are supported?

Can I view tool calls and results?

Yes! The viewer automatically detects tool_use and tool_result blocks in Claude's Messages API format. Tool inputs and outputs are displayed in expandable sections for easy inspection.

What if my file can't be parsed?