Prompt workbench

Messages JSON

Paste or edit JSON (messages array) Format JSON

Anthropic Messages API body: { model?, system?, messages } with system lifted from role: "system" rows. OpenAI Chat Completions keeps system inside messages (#522). Demo export uses plain string content only.

Copy Anthropic Messages JSON Download Anthropic Messages JSON Copy OpenAI Chat Completions JSON Download OpenAI Chat Completions JSON

Transcript → JSONL

Lines like User: / Assistant: Convert to JSONL Output

PII scan

Paste text Highlight patterns

Share link

Packs current JSON field into the URL hash (avoid secrets). On supported devices, Share uses the system sheet; otherwise Copy URL.

Prompt lint

Lint Messages JSON