chrisurf
Books
Tools
AI Model Picker
Capability & pricing matrix for the frontier LLMs
LLM Cost Estimator
Count tokens, compare cost across every model
Prompt Library
Engineering prompt templates with variable inputs
JWT Decoder
Inspect JWT tokens — runs 100% in your browser
Regex Tester
Live tester plus curated pattern library for engineers
Format Converter
Convert between HCL, JSON and YAML in any direction
Subnet Calculator
Visual IP subnet & CIDR planning with split/join
Me
Under Construction
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