Free AI Developer Tools
Calculate costs, compare models, validate schemas, and build AI integrations faster. 100% client-side. No login. No tracking.
// blue-ocean
Unique AI tools with near-zero competition — solving problems nobody else does.
Tool/Function Definition Linter
Validate and lint your AI function calling definitions for OpenAI, Anthropic, and Google formats
open█AI Hallucination Risk Scorer
Score prompts for hallucination risk and get actionable suggestions to reduce confabulation
open█Conversation Message Builder
Build and test chat completion message arrays with visual role-based editing
open█Fine-Tuning Dataset Validator
Validate JSONL datasets for LLM fine-tuning with error detection, token counting, and cost estimation
open█Prompt Chain Planner
Design multi-step prompt chains with variable flow validation and export as code or JSON config
open█// cost-&-pricing
Calculate, compare, and optimize your AI API spending.
AI API Cost Calculator
Calculate and compare costs across AI providers including OpenAI, Anthropic, Google, and more
open█AI Subscription Optimizer
Compare AI subscription plans and find the best value based on your actual usage patterns
open█AI Agent Operational Cost Calculator
Model the cost of multi-step AI agent workflows with per-step model selection and overhead multipliers
open█// development
Build, test, and validate AI integrations faster.
JSON Schema Generator for AI
Generate JSON schemas from sample data optimized for AI function calling and structured outputs
open█Prompt Format Converter
Convert prompts between OpenAI, Anthropic Claude, Google Gemini, and other AI provider formats
open█LLM Parameter Playground
Experiment with temperature, top-p, frequency penalty, and other LLM parameters with visual explanations
open█OpenAPI to AI Function Calling
Convert OpenAPI/Swagger specs into AI function calling definitions for any provider
open█AI Model Selection Wizard
Answer a few questions about your use case and get personalized AI model recommendations
open█Context Window Visualizer & Token Counter
Count tokens in your text and visualize how much of each AI model's context window you are using
open█Prompt Template Builder
Build prompt templates with variables, fill them dynamically, and export as code for any AI provider
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