Product Introduction

1. Claude Code History Viewer is a desktop application designed to transform Claude AI's conversation history stored in JSONL format into an interactive visual interface. It enables users to efficiently navigate through past conversations, analyze usage patterns, and retrieve specific information through advanced search capabilities. The tool specifically addresses the challenge of working with Claude's native JSONL storage format by providing structured data visualization.
2. The core value lies in its ability to convert raw technical logs into actionable insights through hierarchical organization of projects/sessions and comprehensive token usage analytics. It serves as a bridge between Claude's machine-readable data format and human-friendly information retrieval needs, optimizing workflow for technical users.

Main Features

1. The application implements virtual scrolling and Rust-based file processing to handle large conversation files exceeding 100MB, achieving 3x faster load times compared to native JSONL parsing through optimized memory management.
2. Integrated syntax highlighting supports 200+ programming languages using prism-react-renderer, preserving code context from Claude conversations while maintaining line-number-accurate diffs for code modification reviews.
3. Cross-session analytics dashboard provides token usage heatmaps, project-level statistics, and time-based filtering with export-ready visualizations, leveraging Tauri's native filesystem access for real-time data updates.

Problems Solved

1. Eliminates manual JSONL parsing requirements by automatically detecting and processing Claude's ~/.claude directory structure through file system watchers, reducing data retrieval time from minutes to milliseconds.
2. Specifically targets macOS-based Claude power users who require historical conversation analysis for workflow optimization, code iteration tracking, and resource allocation planning.
3. Enables rapid identification of specific code modifications across multiple sessions through regular expression search and content-based filtering, particularly valuable for software developers maintaining long-term AI-assisted coding projects.

Unique Advantages

1. Unlike generic JSON viewers, implements Claude-specific conversation schema validation with automatic error correction for malformed entries, ensuring 99.8% data integrity through checksum verification.
2. Features real-time collaborative annotation capabilities through GitHub integration, allowing teams to add contextual notes directly to conversation timelines without modifying original data.
3. Maintains 2x faster rendering performance than Electron-based alternatives through Tauri's Rust core and WebView optimizations, while achieving 40% reduced memory footprint through smart conversation caching.

Frequently Asked Questions (FAQ)

1. What platforms are currently supported? The application is optimized for macOS with Universal Binary support, utilizing native Cocoa APIs for filesystem monitoring and energy-efficient background processing. Windows/Linux versions are planned for future releases.
2. How does it handle extremely large conversation files? Implemented paginated loading with LRU caching strategy processes files in 100-message chunks while maintaining full-text search indexes through mmap-based memory allocation.
3. What languages does the interface support? Current localization includes Korean, English, Japanese, and Simplified/Traditional Chinese, with locale-specific datetime formatting and measurement unit conversions automatically applied based on system settings.