HandyAI
Free AI developer tools for LLMs including token counters and cost calculators.
What is HandyAI?
HandyAI is a Prompt Management tool. Free AI developer tools for LLMs including token counters and cost calculators. It is aimed at llm developers, ai engineers and prompt engineers.
HandyAI offers free single-purpose tools for LLM developers, including a token counter and API cost calculator across multiple models. It runs client-side with no signup required. Features include prompt analysis, JSON conversion, and various LLM-related utilities.
Built for llm developers, ai engineers and prompt engineers.
Key capabilities
Features
LLM Token Counter
AI Cost Calculator
JSON Schema → Claude Tool
Prompt Diff Tool
Markdown → Anthropic Messages API
Claude System Prompt Analyzer
Regex Builder from Natural Language
JSON Validator + AI Fixer
Prompt Template Extractor
Use cases
- Analyze prompt structure for LLM optimization
- Convert markdown to Anthropic Messages API format
- Calculate API costs for multiple LLM models
- Count tokens in text for GPT, Claude, and Gemini
- Generate regex patterns from natural language descriptions
- Validate and fix JSON with AI assistance
Who it's for
- LLM Developers
- AI Engineers
- Prompt Engineers
Pros & cons
Pros
- Free to use with no signup required
- Client-side execution for privacy
Cons
No documented limitations yet.
AI models
- GPT 4o
- Claude 3.5 Sonnet
- Gemini 1.5 Flash
FAQ
What is HandyAI?
HandyAI is a Prompt Management tool. Free AI developer tools for LLMs including token counters and cost calculators. HandyAI offers free single-purpose tools for LLM developers, including a token counter and API cost calculator across multiple models. It runs client-side with no signup required. Features include prompt analysis, JSON conversion, and various LLM-related utilities.
Who should use HandyAI?
HandyAI is built for llm developers, ai engineers and prompt engineers. Common uses: analyze prompt structure for LLM optimization, convert markdown to Anthropic Messages API format, calculate API costs for multiple LLM models and count tokens in text for GPT, Claude, and Gemini.
What are the best alternatives to HandyAI?
Similar tools on AiByts include PromptLayer, manifest.build, Oracle AI, GPT4All and Kimi Business.
Details are compiled from HandyAI's website and public sources, last verified Oct 3, 2026. Features and pricing change — confirm on the official site before you buy.
Try HandyAI
Visit the official website
Tags
- Token Counter
- Cost Calculator
- Prompt Analyzer
- JSON Converter
- Regex Generator
- Markdown Converter
- Prompt Template
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