Simple, fast tools for developers and AI engineers. No bloat. No subscriptions you'll regret. Just tools that work.
Beautiful JSON viewer, formatter, and explorer. Paste JSON and instantly visualize it as a collapsible tree with syntax highlighting and search.
→ Open toolGenerate JSON Schemas from any JSON instantly. Validate JSON against schemas. Export TypeScript types. Perfect for LLM tool calling and API design.
→ Open toolVersion, test, and compare prompts across AI models. A/B test and track performance over time. Built for AI engineers.
Everything runs in your browser. No server round-trips, no waiting. Results are instant.
Built for the workflows AI developers actually use — JSON schemas, structured outputs, prompt engineering.
Free tools that are genuinely useful. Pro upgrades that are reasonably priced. No dark patterns.
New tools ship regularly. One platform, one ecosystem, built one tool at a time.