AI Developer Toolbox
Fast, private utilities for people who build with LLMs: count tokens and estimate monthly API cost, export your Claude / Gemini / ChatGPT chats, generate AGENTS.md and MCP configs for coding agents, and turn sample JSON into a Structured Outputs schema.
TL;DR: og.cc.cd is a free set of in-browser AI developer tools — a token counter, a monthly LLM API cost calculator, AI chat export, AGENTS.md / MCP config / JSON Schema generators — plus sourced guides; nothing you paste is uploaded.
Tools
Multi-model Token Counter
Count tokens with tiktoken (o200k / cl100k) and compare API cost across GPT, Claude, Gemini, DeepSeek and Qwen — prices checked 2026-10-22.
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CHATAI Chat Export & Viewer
Open your Claude or ChatGPT conversations.json, or paste a Gemini chat. Browse, search and export to Markdown, PDF or Word.
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MDAGENTS.md / CLAUDE.md / SKILL.md Generator
Fill a short form, pick a template and get a clean instruction file for Codex, Claude Code, Cursor or Agent Skills — with live preview.
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$LLM API Cost Calculator
Requests per day × average tokens × cache hit rate → daily and monthly cost for every major model, sorted cheapest first.
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MCPMCP Config Generator
Generate claude_desktop_config.json, Cursor or VS Code mcp.json with presets for Filesystem, Fetch, GitHub and Playwright.
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{ }JSON Schema Generator
Paste sample JSON, get a strict-mode schema for OpenAI Structured Outputs and function calling, or plain draft 2020-12.
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Why og.cc.cd
Private by design
No accounts, no uploads, no analytics scripts. Your data stays in this tab.
Light and fast
Plain HTML, CSS and a little JavaScript. The heavy tokenizer file only loads on the token page.
Sourced prices
Every price links to the vendor’s official page and shows the date it was checked.
Guides
Short, sourced explainers that go with the tools.
Cheapest LLM APIs (October 2026): Best-Value Models for Low Cost, Coding, Long Context and Chinese Vendors
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Best Personal AI Agents in 2026: Top 3 Picks for Office Work, Coding, Browser Tasks, Free Trials and China
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Free Token Counters and LLM Cost Calculators Compared: og.cc.cd, OpenAI Tokenizer, Tiktokenizer, tiktoken and Vendor APIs
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How LLM Tokens Work — and How to Estimate API Cost Before You Ship
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LLM API Price Comparison: OpenAI, Claude, Gemini, Grok, DeepSeek, Qwen, Kimi, GLM and More (October 2026)
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Reduce LLM Token Usage: Prompt Caching Basics for OpenAI, Claude, Gemini and DeepSeek
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How to Export Your Claude Chat History (and Read the conversations.json File)
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How to Export ChatGPT Conversations and Read conversations.json
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How to Save and Export Gemini Chats: Docs, Share Links, Takeout and Markdown
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What Is AGENTS.md? How to Write One That Coding Agents Actually Follow
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CLAUDE.md Best Practices: Writing Project Memory for Claude Code
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How to Write a SKILL.md: Agent Skills Format, Fields and Examples
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What Is MCP (Model Context Protocol)? A Beginner’s Explainer
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How to Set Up MCP Servers in Claude Desktop, Cursor and VS Code
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OpenAI Structured Outputs: Writing a JSON Schema That Strict Mode Accepts
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LLM Context Window Comparison: GPT-6, Claude 5.5, Gemini 4, DeepSeek and Qwen
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How to Estimate LLM API Costs: A Method With Worked Examples
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Cursor Rules Guide: .cursor/rules, .mdc Files and How They Relate to AGENTS.md
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Migrating from MiMo V2.5 to V2.6: Model IDs, Prices and API Examples
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How to Get an LLM API Key: OpenAI, Claude, Gemini, DeepSeek, Qwen, Kimi, GLM and More
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Personal AI Agents Compared: ChatGPT, Claude, Gemini, Copilot, Perplexity Comet, Manus and China’s Doubao, Qwen, Kimi, GLM (October 2026)
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FAQ
Are these tools really free?
Yes. All six tools are free to use with no sign-up.
Do you upload my prompts or chat history?
No. Token counting, chat parsing and file generation all run in JavaScript inside your browser. The site has no backend that receives your text.
Does the site work in mainland China?
The site loads no third-party CDNs, fonts or trackers — every script and font is served from og.cc.cd itself, so nothing is blocked by a third-party domain.
How often are model prices updated?
Prices are copied by hand from each vendor’s official pricing page. The date of the last check is shown on the token counter, next to a link to each source.