OTPfill

What is OTPfill?

OTPfill is a Mac menu bar utility that retrieves one-time login codes from connected email inboxes and places them into verification-code fields. When a code field is focused, it checks recent messages and displays the matching code beneath the field. Users can click Fill or press ⌘⇧O; if the message came from the site currently in use, OTPfill can fill the code automatically.

It supports major hosted mail services and other IMAP accounts, and works in common Mac browsers as well as native Mac apps. OTPfill checks inboxes only while a code field is focused, looking for messages from the previous three minutes. The site states that message text is processed in memory on its server and that emails and their contents are not stored or logged.

What can OTPfill do?

Email-based OTP autofill

Finds recent one-time login codes in connected inboxes and shows the result beneath a focused verification-code field.

Manual and automatic filling

Fill a detected code by clicking the Fill control or pressing ⌘⇧O. Codes can fill automatically when the email came from the site currently in use.

Broad mailbox support

Works with Gmail, Google Workspace, Outlook, Microsoft 365, iCloud Mail, Yahoo Mail, Fastmail, and other IMAP accounts.

Browser and native-app coverage

Supports Safari, Chrome, Arc, Dia, Brave, Edge, other Chromium browsers, and native Mac applications.

Recent-message filtering

Checks connected inboxes only while a code field is focused and searches messages from the last three minutes; promotional codes in the same inbox are ignored.

Account access controls

Gmail and Outlook connect through OAuth via Composio, IMAP passwords are encrypted before being saved, and removing an inbox in Settings revokes access.

Use Cases

“Signing in through a browser”

When a website sends a verification code by email, focus its code field and use the displayed result instead of switching to the mail tab to copy it.

“Authenticating in a Mac app”

Use OTPfill with native Mac applications that present email-based verification fields, not only with browser-based sign-in pages.

“Working across several mail accounts”

Connect supported Gmail, Microsoft, Apple, Yahoo, Fastmail, or IMAP inboxes when login codes arrive in different accounts, then let OTPfill check the connected inboxes during an active code-entry step.

Frequently Asked Questions

Which operating system does OTPfill require?

OTPfill is available for Mac computers running macOS 14 or later.

Which email accounts can it connect to?

It supports Gmail, Google Workspace, Outlook, Microsoft 365, iCloud Mail, Yahoo Mail, Fastmail, and other IMAP accounts.

When does OTPfill read my inbox?

The site says OTPfill checks connected inboxes only while a verification-code field is focused and only looks at messages from the last three minutes.

Does OTPfill store my emails?

The site states that message text passes through its server in memory to find the code, while emails and their contents are not stored or logged.

Does OTPfill support SMS or authenticator-app codes?

The available source does not provide an answer about SMS messages or authenticator-app codes.

Quick Facts