Wrap developer instructions, user inputs, and safety constraints in robust XML delimiter tags for Claude and OpenAI.
Execution runs 100% locally inside the browser sandbox using HTML5 Canvas, Web Cryptography Subtle API, and Web Workers. Zero egress.
Zero network latency. Operates completely offline with zero dependencies on third-party backend servers or cloud services.
Built according to official RFC specifications, cryptographic test vectors, and enterprise-grade data transformation standards.
Enter or configure your target inputs and parameters in the clean interface.
Calculations, formatting, and generation occur instantly in-browser using WebAssembly and WebCrypto.
Copy formatted results or download generated assets with a single click.
Zero-egress companion tools in the AI Utilities suite
Calculate API inference cost given prompt and completion token counts.
Structure complex prompts using Claude-compliant XML encapsulation tags.
Design sequential multi-step prompt chains (Extraction -> Verification -> Summarization).
Generate systematic Prompt Eval test case matrices in JSON format for automated benchmark suites.
