Tier 1
Free AI and LLM tools
Practical, browser-based calculators and references for choosing models, planning prompts, and understanding how LLM APIs work.
Tier 1
Token Counter
Estimate token, word, and character counts locally across model families.Open toolTier 1
Tokens ↔ Words Converter
Convert approximate tokens, words, and characters by model family.Open toolTier 1
LLM Pricing Comparison
Sort and filter current per-token model prices and context windows.Open toolTier 1
Context Window Comparator
Compare model context limits and test whether a document fits.Open toolTier 1
Subscription vs API Cost
Compare monthly consumer subscriptions with estimated API usage.Open toolTier 2
Single-Prompt Cost Calculator
Estimate one prompt and response across every supported model.Open toolTier 2
AI Model Comparison Tool
Compare model specs, prices, and context windows side by side.Open toolTier 2
Prompt Template Library
Search reusable prompt templates for coding, writing, analysis, and agents.Open toolTier 2
JSON Schema Validator
Validate a JSON Schema or tool definition directly in your browser.Open toolTier 2
Markdown Previewer
Preview AI-generated Markdown with tables, lists, and code.Open toolTier 2
RAG Chunk Budget Planner
Plan retrieval chunk sizes around a model’s context window.Open toolTier 2
AI/LLM Glossary
Plain-language definitions of common AI and LLM terms.Open toolTier 2
Rate Limit Calculator
Estimate throughput, minimum duration, and safe concurrency.Open toolTier 2