What is token-converter?

Token Converter is a small web tool that converts authentication token configurations between three formats used by tools that proxy or interact with AI language model APIs. The three formats are Codex auth.json, which is the configuration used by the Codex command-line interface, CPA (short for ChatGPT-Proxy-Api), and Sub2API (also called ChatGPT-to-API). Each of these is a different way to store or pass API credentials, and this tool lets you move a credential file from one of these formats into another without writing any code yourself. The tool is entirely browser-based and works without an internet connection. You can either open it directly from the GitHub Pages URL the author provides, or download the single index.html file and open it locally. There is no server involved and no data is sent anywhere, since all processing happens inside your browser. To use it, you drag and drop a JSON file or folder onto the page, or paste JSON text directly. The tool automatically detects which of the three formats the input is in, then converts it to whichever target format you select. The entire interaction is a single HTML page with no dependencies on external libraries fetched at runtime. The README is written in Chinese and is intentionally brief, so detailed documentation about each format's internal structure is not included in the repository. This tool is most relevant to people who work with self-hosted or third-party proxy setups for AI APIs and need to reformat their credential files to match a different tool's expected input.