Free Claude Code Tools

20 free tools for Claude Code: generators for every config file, calculators for cost and context, and complete references kept in sync with the official docs. No sign-up, nothing leaves your browser.

Generators

Fill in a form, get a config file that works. Everything runs in your browser.

settings.json generatorPick a model, permission mode, allow and deny rules, env vars and more. Get a valid .claude/settings.json.Hooks generatorPick an event, matcher and recipe (format on save, block rm -rf, notify when done) and get the hooks JSON.Status line generatorChoose segments (model, folder, git branch, context %, cost, rate limits) and get a statusline.sh plus settings.Subagent generatorFill in a name, description, tools, model and prompt. Get a .claude/agents/*.md file with valid frontmatter.CLAUDE.md generatorAnswer a few questions about your stack, commands and conventions. Get a lean, useful CLAUDE.md.MCP config generatorDescribe an MCP server (stdio, HTTP or SSE) and get the claude mcp add command and the .mcp.json entry.GitHub Action generatorBuild a claude-code-action workflow: @claude mentions, auto PR review, or a scheduled job.Plugin manifest generatorGenerate .claude-plugin/plugin.json and a marketplace.json so people can /plugin install your work.SKILL.md validatorPaste a SKILL.md and check its frontmatter, name, description length and common mistakes.Permission rule testerPaste allow, ask and deny rules and see whether a Bash command, file path or URL would run or prompt.

Calculators

Work out what Claude will cost and how much fits in context.

API cost calculatorEstimate Claude API spend per request and per month, with prompt caching and the Batch API.Token counterPaste text or code to estimate Claude tokens, cost and how much of the context window it uses.

References

Every command, flag, shortcut, env var and hook event, searchable and refreshed from the official docs.

Claude Code cheat sheetThe commands, shortcuts, flags and files you use every day, on one printable page.Slash commandsEvery built-in Claude Code slash command and bundled skill, searchable.Keyboard shortcutsEvery Claude Code keyboard shortcut, vim binding and rebindable action.CLI flagsEvery claude command and flag: -p, --continue, --model, --allowedTools and the rest.Environment variablesEvery environment variable Claude Code reads, searchable by name or purpose.Hook eventsEvery hook event, what its matcher filters, and which ones can block.Claude models & IDsCurrent Claude model IDs, context windows, pricing and Claude Code aliases.Ecosystem statsHow many MCP servers, skills and mods exist, what they do, and who builds the most popular ones.

Link to these tools

Writing a Claude Code tutorial or course? You're welcome to link to any of these pages. The references refresh from Anthropic's documentation, so links stay accurate as Claude Code changes.