Welcome to the API Key Manager, a modern web application designed to help developers securely organize and manage their API credentials. Built entirely with HTML, CSS, and JavaScript, this tool provides a clean, intuitive interface for storing, categorizing, and protecting your API keys locally within your browser. With no server transmission required, your sensitive data remains private and secure, giving you complete control over your credentials while offering powerful organization features that streamline your development workflow.

This application combines robust functionality with a sleek, responsive design that works seamlessly across all devices. Whether you're managing keys for payment gateways, cloud services, social media platforms, or databases, the API Key Manager offers essential features like strength evaluation, masked display, clipboard integration, and export capabilities—all wrapped in an attractive interface with theme customization. It's the perfect solution for developers seeking an efficient way to handle multiple API keys without compromising security or convenience.

You may also check this simple HTML, CSS and JavaScript project:

• Modern Image Background Remover
• Interactive Fireworks Animation
• Sales Tax Calculator
• Payment Tracker App
• Input Type Designer App

Key Features:

• Secure local storage using the browser’s localStorage with no server transmission

• Add, edit, and delete API keys with categorized organization

• Visual key strength indicator evaluating password complexity

• Masked API key display by default with optional reveal toggle

• Copy-to-clipboard functionality with visual feedback

• Tag-based organization system with predefined categories

• Advanced search and filtering by name, category, or tags

• JSON-based export and import functionality

• Statistics dashboard showing key metrics and usage patterns

• Dark and light theme toggle for user preference

• Fully responsive design compatible with all device sizes

• Last-used timestamp tracking for monitoring key activity

• Notes field for additional context and documentation

Technologies Used:

• HTML5 – Semantic structure and application framework

• CSS3 – Flexbox, Grid, and modern responsive layouts

• Vanilla JavaScript – Core application logic and interactivity

• Font Awesome – Icons for UI elements and indicators

• Google Fonts – Poppins and Roboto Mono typography

• CSS Custom Properties – Theme management and styling

• LocalStorage API – Persistent client-side data storage

• Clipboard API – Secure API key copying

How to Use:

• Enter a descriptive name in the Key Name field

• Paste or type your API key to view the strength evaluation

• Select a category from the dropdown for organization

• Click tags to assign relevant labels to the key

• Add optional notes for context or documentation

• Click Save API Key to store the key locally

• Use the search bar to find keys by name, tags, or notes

• Filter stored keys by category using the dropdown filter

• Toggle masked or revealed view using the eye icon

• Copy the API key using the clipboard icon

• Edit existing keys by clicking the edit icon

• Delete keys permanently using the trash icon with confirmation

• Switch between dark and light themes via the moon/sun icon

• Export all stored keys as a JSON file

• Import previously exported keys using the Import button

• View statistics such as total keys, strong keys, and categories

• Access saved data anytime as it persists across browser sessions

Sample Screenshots of the Project

Landing Page

Sample API Keys

How to Run?

• Download the provided source code zip file.
• Extract the downloaded zip file.
• Open the html file and you are now ready to go!

Video Demonstration for Installation/Setup:

Conclusion:

In conclusion, the API Key Manager represents a practical and secure solution for developers seeking to efficiently organize their API credentials while maintaining full control over sensitive data. By leveraging modern web technologies with local browser storage, this application successfully balances functionality with user privacy, offering an intuitive interface that simplifies key management without compromising security. As development environments grow increasingly complex with multiple services and APIs, tools like this become essential for maintaining organization and security in your workflow.

That's it! I hope this "API Key Manager App Using HTML, CSS and JavaScript" will assist you on your  programming journey, providing value to your current and upcoming project.

For additional tutorials and free source codes, explore our website.

Enjoy Coding :>>