https://github.com/jinhoso/flutter-password-strength

A password strength checker for flutter.
https://github.com/jinhoso/flutter-password-strength

animation flutter password strength

Last synced: 4 months ago
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A password strength checker for flutter.

• Host: GitHub
• URL: https://github.com/jinhoso/flutter-password-strength
• Owner: JinHoSo
• License: mit
• Created: 2019-12-03T08:22:44.000Z (over 6 years ago)
• Default Branch: master
• Last Pushed: 2026-01-27T12:29:07.000Z (4 months ago)
• Last Synced: 2026-01-28T00:20:19.590Z (4 months ago)
• Topics: animation, flutter, password, strength
• Language: Dart
• Size: 83 KB
• Stars: 22
• Watchers: 1
• Forks: 19
• Open Issues: 14
• Metadata Files:
  • Readme: README.md
  • Changelog: CHANGELOG.md
  • License: LICENSE

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README

          
# flutter_password_strength

A password strength checker for flutter.

## Features  

  

 - Linear strength indicator.

 - Customise colors, borders, etc.

## Screenshot

![](https://media.giphy.com/media/kbuhBEahzQAtifnfSL/giphy.gif)

## Usage

  ```

    import 'package:flutter_password_strength/flutter_password_strength.dart';

    FlutterPasswordStrength(

      password: _password, 

      strengthCallback: (strength){

        debugPrint(strength.toString());

      }

    )

  ```

### Arguments

| Arguments  | Default  | Type | Description |

| :------------ |---------------:| :---------------| :-----|

| password | required | String | Password  |

| width | null | double | Strength bar width |

| height | 5 | double | Strength bar height |

| strengthColors | null | TweenSequence | `0.0 ~ 0.25 : red, 0.26 ~ 0.5 : yellow, 0.51 ~ 0.75 : blue, 0.76 ~ 1 : green` |

| backgroundColor | Colors.grey| Color | background for strength bar |

| radius | 0 | double | Strength bar radius  |

| duration | milliseconds: 300 | Duration | Animation duration |

| strengthCallback | null | `void Function(double strength)` | Strength callback, return between 0 to 1 |