Top Flutter PIN, OTP and Password Field packages

Last updated: May 18, 2026

Often user verification or transaction verification is required for payments or in banking, finance, and fintech apps. For verification, the user is required to enter a:

• PIN: A four to six-digit numerical code used to verify the identity of the user. This code is only known to the user and can be entered via a number pad.
• One-time password (OTP): A type of password that is only valid for a single use. OTPs provide an extra layer of security and are typically sent via SMS or generated by an authenticator app.
• Password: A custom, persistent string set by the user.

Best Practices for PIN & OTP Fields

Handling secure inputs requires a balance of high security and low friction for the user: - SMS Autofill: Use packages that support native SMS autofill (like pinput). This drastically reduces friction by automatically populating the OTP when the SMS arrives, so the user doesn't have to switch apps. - Visual Feedback & Focus: Automatically focus the first input box when the screen loads, and provide immediate visual feedback (e.g., turning the border red) if an incorrect code is entered. - Resend Mechanisms: Always include a "Resend Code" option accompanied by a cooldown timer to prevent users from spamming OTP requests. - Security: Never store OTPs locally. Use flutter_secure_storage for storing authentication tokens after successful verification, and ensure all API requests happen over HTTPS.

The complete list of Flutter packages that provide highly customizable fields, animations, and autofill utilities to enter a PIN, SMS code, Password, or OTP in your Flutter app is provided below. The most popular choice in the community is pinput.