Tools / Localization Helper

Flutter Localization Helper

Inspect source and target ARB bundles. Validates key parity, placeholder variables, and supported ICU plural/select syntax with a live registered Flutter template and ambient RTL/LTR stress preview.

Preset Scenario:

📖Tutorial Guide (T08.06)↗

✓Verified Supported

🔒 100% In-Memory

Source ARB Bundle (Base Reference)

7 keys

{
  "@@locale": "en",
  "@@context": "WidgetExamples Localization Lab",
  "welcome": "Welcome, {name}!",
  "@welcome": {
    "description": "Greeting shown on the home header",
    "placeholders": {
      "name": {
        "type": "String",
        "example": "Chirag"
      }
    }
  },
  "profileCard": "{firstName} {lastName} ({role})",
  "@profileCard": {
    "description": "User card title with name and assigned role",
    "placeholders": {
      "firstName": {
        "type": "String"
      },
      "lastName": {
        "type": "String"
      },
      "role": {
        "type": "String"
      }
    }
  },
  "dontTouch": "Don''t touch this item",
  "@dontTouch": {
    "description": "Warning message with escaped apostrophe"
  },
  "codeSample": "To define a set, write '{'value'}' in Dart.",
  "@codeSample": {
    "description": "Technical instruction demonstrating literal escaped braces"
  },
  "itemCount": "{count, plural, =0{No items} =1{1 item} other{{count} items}}",
  "@itemCount": {
    "description": "Plural counter with explicit zero, one, and fallback",
    "placeholders": {
      "count": {
        "type": "num",
        "format": "compact"
      }
    }
  },
  "genderGreeting": "{gender, select, female{Hello Ms. {name}} male{Hello Mr. {name}} other{Hello {name}}}",
  "@genderGreeting": {
    "description": "Select statement branching on gender with required fallback",
    "placeholders": {
      "gender": {
        "type": "String"
      },
      "name": {
        "type": "String"
      }
    }
  },
  "notifications": "{role, select, admin{{count, plural, =0{Admin: zero alerts} =1{Admin: 1 alert} other{Admin: {count} alerts}}} other{{count, plural, =0{No alerts} other{{count} alerts}}}}",
  "@notifications": {
    "description": "Nested select containing plural branches with required fallbacks at all levels",
    "placeholders": {
      "role": {
        "type": "String"
      },
      "count": {
        "type": "num"
      }
    }
  }
}

Target ARB Bundle (Translation)

7 keys

Matching Keys6

Valid Reordered1

Missing Keys0

Extra Keys0

Fallback Errors0

Unsupported ICU0

Registered Flutter Template PreviewLive CanvasKit Engine

Scale:

ℹ️Scoped Template Scope: Demonstrates registered widgets (Profile Card, Plural Counter, Gender Select, Notifications) with active ARB messages. Covers this registered template, not every screen in an uploaded app.

R08 • R10 • R38

Key Parity & Placeholder Diagnostics

7 messages

welcomesrc:L4tgt:L3

Source:Welcome, {name}!

Target:¡Bienvenido, {name}!

Matching▼

profileCardsrc:L14tgt:L4

Source:{firstName} {lastName} ({role})

Target:{lastName}, {firstName} ({role})

Reordered (Valid)▼

dontTouchsrc:L29tgt:L5

Source:Don''t touch this item

Target:No toques este elemento

Matching▼

codeSamplesrc:L33tgt:L6

Source:To define a set, write '{'value'}' in Dart.

Target:Para definir un conjunto, escribe '{'valor'}' en Dart.

Matching▼

itemCountsrc:L37tgt:L7

Source:{count, plural, =0{No items} =1{1 item} other{{count} items}}

Target:{count, plural, =0{Ningún artículo} =1{1 artículo} other{{count} artículos}}

Matching▼

genderGreetingsrc:L47tgt:L8

Source:{gender, select, female{Hello Ms. {name}} male{Hello Mr. {name}} other{Hello {name}}}

Target:{gender, select, female{Hola Sra. {name}} male{Hola Sr. {name}} other{Hola {name}}}

Matching▼

notificationssrc:L59tgt:L9

Source:{role, select, admin{{count, plural, =0{Admin: zero alerts} =1{Admin: 1 alert} other{Admin: {count} alerts}}} other{{count, plural, =0{No alerts} other{{count} alerts}}}}

Target:{role, select, admin{{count, plural, =0{Admin: cero alertas} =1{Admin: 1 alerta} other{Admin: {count} alertas}}} other{{count, plural, =0{Sin alertas} other{{count} alertas}}}}

Matching▼

Local Report & Export

Download your analyzed ARB files or an authoritative Markdown diagnostic report for pair programming or CI checks.

Local Privacy & Flutter ICU Subset Guarantees (Release R3 Deliverable)

Validation runs 100% locally in your browser memory using an AST recursive-descent parser (R38). Enforces mandatory other fallback branches on plurals and selects, allows reordered placeholders in translations, and strictly separates screen text direction (LTR vs RTL) from translation quality checks.