What is HandyAI?
HandyAI is a collection of small, single-purpose developer tools for working with large language models. The live tools include an LLM Token Counter that compares token counts and cost estimates for Claude, GPT-4o and Gemini side by side, and an AI Cost Calculator that projects monthly API spend across those providers. Most tools run entirely in the browser and require no sign-up.
Several more tools are listed as upcoming, including a JSON Schema to Claude tool-use converter, a cron expression explainer, a prompt diff tool, a Markdown to Anthropic Messages API converter, a system prompt analyzer, a regex builder from natural language, a JSON validator with an AI fixer and a prompt template extractor. Users can sign up for notifications on those pages, and the site notes that data stays in the browser unless an AI-powered tool is invoked.
Key features
- Side-by-side token counting for Claude, GPT-4o and Gemini
- Live cost estimates per call
- Monthly LLM API cost projection calculator
- Client-side processing with no sign-up
- Upcoming JSON Schema to Claude tool-use converter
- Upcoming prompt diff and system prompt analyzer
Who is it for
- Prompt engineers
- LLM builders
- Indie AI developers
Pros and cons
- Free tools that need no sign-up
- Runs in the browser, with data kept on the client unless an AI-powered tool is used
- Most of the listed tools are not yet released (planned for Q3 2026 to Q1 2027)
HandyAI pricing
The vendor does not publish prices in a readable form (often pricing is shown only after signing in).
Is HandyAI free?
Yes, there is a free plan. 10 free tools with no sign-up required. Free access to the live tools is described on the page.
HandyAI alternatives
| Tool | Price from | Free plan | Category |
|---|---|---|---|
 OpenRouter | not listed | yes | APIs & models |
 OpenAI Platform | 0,10 USD | ? | APIs & models |
 Mintlify | 450 USD/mo | trial | APIs & models |
 xAI API | 0.002 USD | trial | APIs & models |
 Cline | not listed | yes | APIs & models |
 Groq | not listed | ? | APIs & models |
FAQ
What is HandyAI used for?
A set of single-purpose, browser-based tools for counting LLM tokens, estimating API costs and building prompts, aimed at prompt engineers and AI developers.
Is HandyAI free?
Yes, there is a free plan. 10 free tools with no sign-up required. Free access to the live tools is described on the page.
How much does HandyAI cost?
The vendor does not publish prices publicly or requires sign-in.
What are the best HandyAI alternatives?
Closest alternatives: OpenRouter, OpenAI Platform, Mintlify, xAI API, Cline.
Data checked October 12, 2026 on the vendor website (handyai.tools).