Anyone who uses Claude Code regularly has probably wondered: what did I ask it to do three weeks ago? The sessions pile up locally but there's no built-in way to browse them.
Claude Code History Viewer, an open-source Electron app by developer Yanick Landry, fills that gap. It reads your stored Claude Code conversations from local storage and presents them in a searchable chat interface with markdown rendering, syntax highlighting, and tool usage indicators.
The app is straightforward. It scans your Claude Code session files (stored in ~/.claude/projects/ on macOS/Linux or %APPDATA%\claude\ on Windows), sorts conversations chronologically, and renders them with the same dark theme aesthetic as Claude's own interface. Code blocks get automatic language detection and syntax highlighting via Highlight.js.
All processing happens locally. No data leaves your machine, which matters given that Claude Code sessions can contain proprietary code, API keys, and other sensitive context.
The tool is early-stage, with just 3 stars and 3 commits on GitHub. Pre-built downloads are available for macOS (.dmg), with Windows (.msi) and Linux (.AppImage) builds available from source. It requires Node.js 16+ and an existing Claude Code installation with session history to read.
It's a small utility solving a real annoyance. If you use Claude Code daily and want to reference past sessions without digging through raw JSON files, this does the job.