Save and autofill logins in Chrome

The LocalDB Chrome extension fills a saved email or id and password on the login page in your current tab. It can also capture credentials from a new site and prepare them for saving.

The extension fills fields but does not press the site’s sign-in button. Review the values and submit the form yourself.

If you are new to LocalDB, first save an item in your personal vault. To connect a folder backup to the extension, review the Cloud and Local storage guide.

Only Site autofill items are used by the extension. General data never appears in its match list.

Install LocalDB from the Chrome Web Store

1. Install and pin the extension

Select Add to Chrome on the store page. After installation, open Chrome’s puzzle menu and pin LocalDB for quick access on sign-in pages.

The extension is for desktop Chrome. Mobile Chrome does not install it in the same way.

2. Sign in with the same Google account

Open the LocalDB toolbar icon and select Start with Google. Use the same Google account as the LocalDB web app.

The extension needs its own sign-in even if the web app is already open. Local backups and prefilled Local-mode save forms work only when the extension and web app use the same Google account.

3. Fill a login form

1. Open an HTTPS login page.
2. Select the LocalDB extension.
3. Choose an account matching the current site.
4. Check the filled ID and password.
5. Press the site’s sign-in button yourself.

For several accounts on one domain, the popup lets you choose the right one.

You can also right-click the page and select Fill login with LocalDB. When several accounts match, the context menu uses the first match. Use the popup when account choice matters.

New tabs, chrome:// settings, and extension pages are not normal websites and cannot be filled.

4. Require a PIN before filling

Create a six-digit PIN in the web app:

1. Open Settings → General → PIN on LocalDB.
2. Enter six digits and save.
3. Open a sensitive Site autofill item.
4. Turn on Confirm with PIN and save the item.

Choosing that item in the extension now opens a PIN prompt. The fields are filled only after the correct six digits are entered.

There is no PIN recovery email or screen that reveals the old PIN. Delete or replace it in web settings. If you delete a PIN, protected items may fill without a prompt until a new PIN is created, so replace it immediately when protection is still needed.

5. Save credentials from the current site

After entering an ID and password in a login form, open the extension and select Save credentials for this site.

Cloud mode

A centered save window displays the name, ID, password, and URL collected from the page. Review the fields and select Save to add a Site autofill item.

Required fields must be present. On a site with a two-step login, try again when the password field is visible.

Local mode

In Local mode, the extension opens LocalDB so you can review and confirm the save.

1. Select Save credentials for this site.
2. localdb.io opens with a new-item form prefilled with the site, ID, and password.
3. Review it and select Add in the web app.
4. The item is written to the browser list and selected Local backup folder.

The web app must also be in Local mode, and its Google account must match the extension.

6. Connect a backup in Local mode

When the popup shows Local, select Connect backup and choose the same folder used by the web app or an exported encrypted ZIP.

The extension reads autofill items from that backup. Use the same folder to keep the extension up to date with items saved in the web app.

Backups from another Google account are rejected.

7. Take lookalike-domain warnings seriously

LocalDB stops filling and warns when the current address resembles a saved domain but is actually different—for example, one changed character or a trusted name embedded inside a longer domain.

Do not force a fill after this warning. Check the actual domain in Chrome’s address bar first. A subdomain such as login.example.com can still be treated as related to example.com.

8. If filling does not work

• Confirm that the item type is Site autofill, not General data.
• Compare the saved domain with the address bar.
• Wait until a visible password field appears.
• Sign in inside the extension, not only on the website.
• In Local mode, connect a backup and use the same Google account.
• Enter the web app’s six-digit PIN when prompted.

The extension never submits the login form. Check the account and domain, then sign in yourself.