Sharper utilities for everyday AI work.
Token counters, cost estimators, prompt builders and visualizers — free, and they run in your browser.
Token Counter
Paste text and see roughly how many tokens it uses and how much of a context window it fills.
LLM Cost Estimator
Estimate monthly API spend from request volume, prompt size and output length.
Prompt Builder
Assemble role, task, context, format and constraints into a clean, reusable prompt.
Prompt Optimizer
Score a prompt against best-practice checks and get concrete fixes for each weak spot.
JSON Schema Builder
Design the JSON shape you want back from a model and export the schema for structured output.
RAG Chunking Visualizer
See how chunk size and overlap split a document before it goes into a vector database.
Embedding Similarity Explorer
Compare sentences and see why "similar meaning" beats "same words" in semantic search.
AI Flashcards
Flip through the AI terms that come up in every lesson, interview and job description.