15+ Dev Tools in One App – Full Source Code

Overview

Unlock the potential of the Developer Toolkit with this complete source code. This app features 15+ essential developer tools that work offline, making it the perfect solution for developers, programmers, testers, and engineers who need quick, reliable utilities without relying on internet access.

Included tools:

📝 JSON Formatter: Beautify and validate JSON data.

📄 XML Beautifier: Format XML data for better readability.

🌐 HTML Viewer: View HTML content.

🔐 Base64 Encoder/Decoder: Encode and decode Base64 strings.

⚡ Hash Generator: Generate MD5, SHA-1, SHA-256, and SHA-512 hashes.

🔗 URL Encoder/Decoder: Encode and decode URLs.

🔍 Regex Tester: Test regular expressions against text.

📊 Text Diff: Compare two texts to find differences.

🎲 UUID Generator: Generate universally unique identifiers.

🎨 Color Converter: Convert color codes between different formats (e.g., RGB, Hex).

📜 Log Viewer: View application logs.

🔡 Morse Code Converter.

📱 App Info Viewer: View detailed information about installed applications.

⚙️ JavaScript Tester: Execute JavaScript code snippets.

🧾 HTTP Header Viewer: Parse and view HTTP headers.

📐 Network Packet Size Calculator: Calculate network packet sizes.

🔢 MAC Address Formatter: Format MAC addresses.

🚀 Offline Functionality: All core tools work without an internet connection.

The source code is clean, well-documented, and easy to customize. It is designed to work offline, offering a fast, secure, and seamless experience without the need for APIs or internet connectivity.

Features

🔧 Complete source code for 15+ offline developer tools

📱 100% native Android Studio Project (Java/Kotlin)

🌐 Works 100% offline—no data or APIs needed

💰 AdMob Integration ready

⚙️ Easy to modify and integrate into your projects

📚 Detailed documentation included

Requirements

🛠 Android Studio (latest stable version recommended)

📦 Gradle (configured automatically with Android Studio)

🤖 Minimum SDK 24 (Android 7.0 – Nougat) or higher

💾 50 MB free storage space

Instructions

Follow these steps to set up, customize, and build the Offline Developer Toolkit:

1. Download & Open Project

📥 Download or clone the source code from your Codester purchase.

🛠 Open in Android Studio (latest stable version recommended).

Wait for Gradle sync to complete automatically.

2. Run the Project

▶ Select a device or emulator running Android 7.0 – Nougat or higher

Click Run (Shift + F10) in Android Studio.

The app will build and install automatically.

3. Customize the App

🎨 Change branding:

Replace app icons in app/src/main/res/mipmap-*.

Update splash screen images in app/src/main/res/drawable.

🧰 Modify tools:

Add, remove, or edit tools in the app module source files.

💰 Enable AdMob:

Add your AdMob App ID to AndroidManifest.xml.

Add Ad Unit IDs in the code where ads are loaded.

🔧 Change app name or package ID:

Update in app/src/main/AndroidManifest.xml and build.gradle.

4. Test the App

📱 Use a real device or high-performance emulator.

Ensure all 18+ tools function offline as intended.

5. Build Release APK

Go to Build → Generate Signed Bundle/APK in Android Studio.

🔑 Create or use an existing keystore for signing.

Select APK → Release → Finish.

Your signed APK will be generated in app/release/.

6. Publish 

📦 Ready to upload to the Play Store, Codester, or any app marketplace.

Include screenshots, icons, and banners for a professional listing.