Render, edit, pan-zoom, and export architectural flowcharts, sequence diagrams, ER schemas, and state machines with zero server round-trips. 100% private, instant offline vector SVG and 2x retina PNG generation.
Everything is rendered in memory with WebAssembly and local JavaScript. Proprietary architectures and tokens never leave your Mac.
Effortlessly navigate huge enterprise microservice topologies with fluid mouse dragging, pinch-to-zoom, and 1-click auto-fit.
Export crystal-clear SVG code for Figma, Notion, and Markdown docs, or generate crisp 2x retina PNG images for team slides.
Offline PWA caching and pre-bundled vendor libraries ensure full functionality during flights, subway commutes, or spotty Wi-Fi.
No. The L2Cache Mermaid Viewer runs entirely in your local browser runtime. Zero HTTP requests, zero cloud tracking, and zero database logging. Test by enabling Airplane Mode above.
Click the 📋 Copy SVG button in the toolbar. You can paste vector SVGs directly into Figma, Sketch, or Adobe Illustrator as native editable shapes. For GitHub or Obsidian, copy the Mermaid snippet directly.
Yes! Click the 🔗 Share button to generate a URL with your diagram code encoded directly in the URL hash fragment. Anyone opening the link will see the exact same diagram rendered locally in their browser.
Flowcharts (graph TD / LR), Sequence Diagrams (sequenceDiagram), Class Diagrams (classDiagram), State Machines (stateDiagram-v2), ER Diagrams (erDiagram), User Journeys (journey), Git Graphs (gitGraph), Gantt Charts (gantt), Mindmaps (mindmap), and Pie Charts (pie).
Create designer QR codes with custom shapes, circular badges, gradients, logos, and print-ready 4000px PNG/SVG export.
Inspect, search, and analyze multi-turn Claude Code and Codex JSONL session transcripts with offline privacy.
Strip API keys, passwords, and tokens before pasting prompts into Claude, ChatGPT, or LLMs.
Deconstruct regular expressions into interactive railroad flowcharts with plain-English breakdowns.
L2Cache for macOS keeps an unlimited, private, instant-searchable history of your clipboard, terminal commands, and Claude Code sessions on your Mac.
Download L2Cache on the Mac App Store ($4.99) →