developer toolbox
Prompt engineering utilities, all in one workspace.
Generate production-grade system prompts, reverse-engineer images into prompts, refine copy and run everyday string transforms — with configurable parameters and reusable presets.
Prompt Engineering
System Prompt Maker
Turn a rough idea into a production-grade XML system prompt for a new agent.
Prompt Optimizer
Rewrite a draft prompt with explicit role, context, constraints and output format.
Cursor System Prompt Generator
Generate a .cursorrules system prompt that steers the Cursor IDE agent on your codebase.
Image to Prompt
Reverse-engineer a generation prompt that recreates a source image.
MCP Tools Explorer
List the live tool schemas of 20+ hosted MCP servers and export a manifest for prompt grounding.
Text
Text Refiner
Fix spelling, grammar and clarity while preserving meaning and formatting.
Text Inspector
Characters, words, lines, paragraphs, reading time and token estimate.
Line Tools
Sort, deduplicate, trim and clean lists of lines.
Regex Find & Replace
Run regular expression replacements with live preview and match count.