Flutter tools for building, fixing and shipping production apps faster.

Diagnose build errors, generate Dart models, prepare pubspec files, test APIs, check packages and improve release workflows from one focused Flutter workspace.

Open Build Doctor JSON to Dart

Developer tool library

Practical Flutter tools for daily app work.

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Flutter Build Doctor

Diagnose Flutter, Dart, Gradle, Java, Kotlin, Android and iOS build failures from logs and project files.

Useful for

Find the real cause behind build and sync errors.

Check SDK, Gradle, Java and Kotlin compatibility.

Copy practical commands and corrected file snippets.

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JSON Formatter and Dart Model Generator

Format API JSON and generate null-safe Dart models, nested classes, helpers and Flutter UI starter code.

Useful for

Clean messy API responses before coding.

Generate models for real app screens.

Preview UI and copy starter Flutter code.

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pubspec.yaml Generator

Build a clean Flutter pubspec.yaml with dependencies, assets, fonts and environment constraints.

Useful for

Start a new project without YAML mistakes.

Add assets and fonts with correct indentation.

Prepare dependency blocks for common app types.

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Advanced API Playground

Test public APIs safely, inspect JSON responses and generate Flutter-ready model and UI starter code.

Useful for

Call test APIs without switching tools.

Inspect response body and structure.

Move from API response to Flutter code faster.

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Package Recommender

Choose Flutter packages by app type, state management, backend and feature requirements.

Useful for

Pick packages for a new app idea.

Compare architecture and backend choices.

Create a package stack before pubspec setup.

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Codebase Builder

Generate a Flutter starter ZIP with architecture, networking, storage, theme and localization.

Useful for

Create starter code for client projects.

Choose architecture and state management.

Download a structured Flutter project ZIP.

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Lottie and Asset Studio

Browse Lottie animations, SVG icons and Flutter-ready visual assets for polished app screens.

Useful for

Find assets for onboarding and empty states.

Use Lottie and SVG files in Flutter UI.

Download categorized assets for app screens.

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Package Compatibility Checker

Check package versions, Flutter and Dart SDK support, platform support, deprecation warnings and upgrade risk.

Useful for

Paste dependencies and review compatibility.

Check Android, iOS and web package support.

Prepare safer package upgrade choices.

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Flutter Upgrade Safety Checker

Compare current and target Flutter versions before upgrading a project.

Useful for

Review possible migration issues before upgrade.

Check package and Android build risks.

Plan fixes before changing the SDK version.

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Pubspec Cleaner

Find unused dependencies, duplicate entries, bad indentation, missing assets and misplaced dev dependencies.

Useful for

Clean pubspec.yaml before release.

Move packages into the right dependency block.

Validate assets, fonts and environment constraints.

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Android Build Config Generator

Generate compatible Gradle, Android Gradle Plugin, Kotlin, Java, compileSdk and targetSdk configuration.

Useful for

Create Android config for a Flutter app.

Fix Java 17 and AGP mismatch faster.

Generate namespace, SDK and Kotlin suggestions.

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Responsive UI Tester

Preview Flutter layouts across mobile, tablet, desktop and foldable screen sizes.

Useful for

Check layout breakpoints visually.

Compare phone, tablet and foldable sizes.

Prepare UI notes for developers and clients.

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Flutter Permission Builder

Generate AndroidManifest.xml and iOS Info.plist permission entries with package guidance.

Useful for

Create camera, location and notification config.

Avoid missing iOS permission messages.

Copy Android and iOS snippets together.

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Deep Link Tester

Test custom URL schemes, Android app links and iOS universal link configuration.

Useful for

Validate app link intent filters.

Check assetlinks and universal link files.

Generate Android and iOS test commands.

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Localization Auditor

Find missing, unused, duplicate and untranslated ARB localization keys.

Useful for

Compare ARB files across languages.

Find untranslated values before release.

Export a clean missing-key report.

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Asset Optimizer

Find oversized and unused images, fonts, SVG files and Lottie animations in Flutter projects.

Useful for

Detect heavy images before app release.

Find assets not referenced in pubspec.yaml.

Prepare cleanup and compression suggestions.

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Release Readiness Checker

Check signing, versioning, icons, permissions, package name, build type and store submission basics.

Useful for

Review Android release setup before upload.

Check icons, version codes and permissions.

Create a final release checklist for beginners.

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Developer workflows

A cleaner way to move from problem to Flutter-ready output.

Each tool is built around a specific developer task, so beginners get guided output and experienced developers can copy useful code, commands and configuration faster.

Fix build errors

Paste logs, inspect project files and get exact next steps.

Create API layers

Format JSON, generate Dart models and copy starter UI.

Prepare project config

Build pubspec, permissions, Android and release configuration.

Choose better packages

Compare package choices, compatibility and upgrade risk.

FAQ

Flutter tools FAQ

What can I do with FlutterFever tools?

You can diagnose build errors, generate Dart models, prepare pubspec files, test APIs, choose packages and improve release readiness for Flutter projects.

Which tool should I start with?

Start with Flutter Build Doctor when your project is failing. Start with JSON to Dart when you are building an API screen.

Can I diagnose Flutter build errors?

Yes. Build Doctor accepts logs and project configuration text, then shows likely causes, affected files and practical fixes.

Can I generate Dart models from JSON?

Yes. The JSON to Dart tool formats JSON, generates null-safe Dart models, nested classes and starter Flutter UI code.

Can I create pubspec.yaml files?

Yes. The pubspec generator helps create dependency, asset, font and environment blocks with clean YAML formatting.

Can I test APIs here?

Yes. The API playground can test public endpoints and help convert JSON responses into Flutter-ready code.

Are these tools beginner friendly?

Yes. The pages are designed to explain what to paste, what the output means and where to use the generated code.

Do the tools edit my project automatically?

No. Tools show generated code, commands or snippets so you can review before applying changes in your project.

Can I use generated output in real apps?

Yes. Generated models, YAML, snippets and commands are meant as practical starting points for production Flutter projects.

Which tools are available now?

Build Doctor, JSON to Dart, pubspec generator, API playground, Deep Link Tester, package recommender, codebase builder and asset studio are linked from this page.