Loginbook — Which Account Did I Use?

Track which account you used on each site. Not a password manager — no passwords stored, no autofill.

Ever get to a login screen and think "wait… did I sign up with Google here, or an email? which email?" Loginbook is a simple, private notebook for exactly that. It keeps an inventory of the accounts you hold across the web — for each site you record the username or email, how you log in (email/password, Google, Kakao, Naver, Apple…), an optional self-written password HINT (never the password itself), the sign-up date, and any notes. Open the popup on a site and Loginbook shows you the account you used there. Loginbook is NOT a password manager: - It never stores your actual passwords and never auto-fills logins. - Everything stays on your own device (Chrome local storage). No account, no sign-in, no server. - Zero data leaves your browser — no analytics, no tracking, no external requests. What you can do: - Record accounts per site and instantly see "which account did I use here?" - Filter by login method, sort, and search across everything. - Back up and restore your inventory as a file you control (import from CSV too — any passwords in an import are discarded, never saved). - Light / dark themes and a color-tone picker. - Available in English, 한국어, 日本語, 中文, and Español. Loginbook is for organizing and remembering — a tidy ledger of your online accounts, right in your browser, entirely under your control.