Free browser tools for developers and AI practitioners. No account. No backend. No data leaves your device.
Three tools live now:
- Prompt Constructor — block-based LLM system prompt builder, export as Markdown/XML/plain text
- Data Converter — CSV, JSON, Excel conversion, fully local
- MCP Scaffold Generator — TypeScript, Python (FastMCP), or SKILL.md boilerplate
Single HTML file. Works offline.
