If you use Claude Code, you have probably hit this wall: the browser stores your login as a sessionKey cookie, but Claude Code wants ~/.claude/.credentials.json . Two different files, same login. I built claudecookie.com to bridge the gap. Three tools, one place: Converter — turn Netscape cookies.txt , Cookie-Editor JSON, Puppeteer format, key-value or a raw Cookie header into each other. Runs entirely in your browser; the paste never leaves your device. Check — paste a s...