flutter_verification_code_field

Package Overview

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A Flutter package for creating a clean, customizable verification code input field, ideal for entering or pasting OTP codes from emails or SMS. It supports automatic focus management between fields, paste detection, and smooth user experience across devices. Designed with simplicity and usability in mind, it integrates seamlessly into authentication flows requiring one-time passwords.

Use cases

OTP entry during login
Two-factor authentication
Account verification via email/SMS
Passwordless login
Form validation for 6-digit codes
Mobile app onboarding

Key features

Auto-focus between code fields
Paste detection from clipboard
Customizable styling
Responsive design for all screen sizes
Supports both Android and iOS
Easy integration with form controllers

Suitable for

Developers building authentication flows
Apps requiring OTP input
UX-focused mobile applications
Projects needing minimal setup for code fields
Teams prioritizing accessibility and usability

Considerations

Requires manual handling of validation logic
Limited to single-line numeric input
No built-in support for dynamic field count
May need additional styling for non-default themes
Not designed for multi-step verification workflows

Original README

Original README snapshot from the linked source repository. Visit the repository for the latest content.

Flutter Verification Code Field

A flutter package which contains a verification code field with a number of advantages, namely with the ability to customize your own validation pattern, customize the number of OTP fields or their size, as well as the spacing between OTP fields, also supports text insertion or character replacement in any cell.

Installing
Usage
Bugs or Requests

Installing

1. Depend on it

Add this to your package's pubspec.yaml file:

dependencies:
  flutter_verification_code_field: ^1.0.0

2. Install it

You can install packages from the command line:

with pub:

$ pub get

with Flutter:

$ flutter pub get

3. Import it

Now in your Dart code, you can use:

import 'package:flutter_verification_code_field/flutter_verification_code_field.dart';

Usage

VerificationCodeField is a Hook Widget that can be used for OTP verification. Include it in your code like:

    VerificationCodeField(
      length: 5,
      onFilled: (value) => print(value),
      size: Size(30, 60),
      spaceBetween: 16,
      matchingPattern: RegExp(r'^\d+$'),
    );

It has many configurable properties, including:

length – Number of the OTP Fields
size – Size of the single OTP Field
spaceBetween – Space between the OTP fields
matchingPattern – Pattern for validation

There are also custom callback:

onFilled – Callback function that is called when the verification code is filled

Bugs or Requests

If you encounter any problems feel free to open an issue. If you feel the library is missing a feature, please raise a ticket on GitHub and I'll look into it. Pull request are also welcome.

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