Customize Claude Code's system prompts, create custom toolsets, add custom themes/thinking verbs/spinner, input box style, user message display, sign-in ASCII art, fix bugs (frozen spinner), and add features (context limit customization). Supports both native (binary) and npm installs on all platforms.

📐 Fast token estimation at 94% accuracy of a full tokenizer in a 2kB bundle

tokdu (Token Disk Usage) is a terminal-based utility that helps you analyze and visualize token usage in your codebase. Similar to the classic du (disk usage) command, tokdu shows you how many tokens your files and directories consume, which is essential when working with Large Language Models (LLMs) that have token limits.

Tiktoken-counter as standalone API

Free AI Prompt Splitter - Split large documents into chunks for ChatGPT, Claude, GPT-4. Supports PDF, TXT, MD files. Smart token counting & overlap control.

Open-source AI usage metering for SaaS. Track tokens, calculate costs, manage quotas. TypeScript SDK supporting all major AI providers & runtimes.

A privacy-first tool to extract, tokenize, and optimize codebases for LLM context (ChatGPT, Claude, Gemini). Features intelligent filtering, security scanning for secrets, and local processing. Built with Next.js 16 & React 19.rate token counting, file tree navigation, and secret detection.

🧮 Calculator for vision tokens in VLMs.

Beautiful status line for Claude Code with per-window token tracking, visual indicators, and intelligent fallbacks

A lightweight PHP package for AI token cost management. Estimate costs before API calls, calculate actual costs from token usage, and track expenses across OpenAI, Claude, Gemini, and other popular AI models.

Display prompt in 75-token chunks alongside the token counter.

Like wc(1) but count tokens in terms of OpenAI LLMs.