Simple-Dev-ToolsHello.World Consulting
Simple developer tools
Explore quick utilities, accelerators, and studios to ship documentation, diagrams, data experiments, and more.
Developer accelerators
Ship faster with guardrails and reusable snippets.
API Snippet Generator
Draft OpenAPI-driven snippets for any stack on the fly.
REST
Swagger
Docs
Mermaid Editor
Sketch sequence diagrams, flows, and architecture quickly.
Diagrams
Planning
SQLite Playground
Run SQL experiments with instant preview and persistence.
SQL
Data
Regex Lab
Iterate on patterns with explainers, tests, and sharing.
Regex
Testing
IDs & Scheduling
Generate ULIDs, UUIDs, and human-friendly CRON helpers.
Scheduling
Automation
Encoders & QR
Encode payloads, produce QR assets, and inspect metadata.
Security
Utilities