MAC address generator
Enter the quantity and prefix. MAC addresses will be generated in your chosen case (uppercase or lowercase).
Tool is 100% private: operates entirely in your browser. No data ever leaves your device. Your data is safe and private!
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Tool Introduction
Our MAC Address Generator is a powerful, free online tool that helps you generate random MAC addresses for testing, development, and network configuration purposes. Whether you're a network administrator setting up test environments, a developer working on network applications, or someone learning about networking, this tool provides a simple way to generate valid MAC addresses. With customizable prefixes, case selection, separator options, and batch generation capabilities, you can create MAC addresses that meet your specific requirements.
How to Use MAC Address Generator
- Set Quantity: Use the quantity field to specify how many MAC addresses you want to generate (1-100)
- Enter Prefix (Optional): Optionally enter a MAC address prefix (e.g., "64:16:7F") to fix the first portion of the address. Leave empty for completely random addresses
- Choose Case: Select uppercase or lowercase formatting for the generated MAC addresses
- Select Separator: Choose your preferred separator: colon (:), hyphen (-), dot (.), or none
- Generate: MAC addresses are automatically generated when you change settings or click "Refresh"
- Copy: Click the "Copy" button to copy all generated MAC addresses to your clipboard
Key Features
- Batch Generation: Generate up to 100 MAC addresses at once
- Custom Prefixes: Specify a prefix to control the first portion of generated MAC addresses
- Case Selection: Choose between uppercase and lowercase formatting
- Multiple Separators: Select from colon, hyphen, dot, or no separator
- Cryptographically Secure: Uses Web Crypto API for truly random generation
- Real-Time Generation: MAC addresses are generated automatically when settings change
- One-Click Copy: Quickly copy all generated MAC addresses to clipboard
- Monospace Display: MAC addresses displayed in monospace font for easy reading
- 100% Private: All generation happens locally in your browser - no data sent to servers
- No Registration Required: Start generating MAC addresses immediately without any sign-up
MAC Address Format Standards
- Colon Format: Most common format (e.g., 64:16:7F:7E:8D:6C) - used in most systems
- Hyphen Format: Alternative format (e.g., 64-16-7F-7E-8D-6C) - used in some Windows systems
- Dot Format: Less common format (e.g., 6416.7F7E.8D6C) - used in Cisco systems
- No Separator: Continuous format (e.g., 64167F7E8D6C) - used in some APIs and databases
Use Cases
- Network Testing: Generate MAC addresses for network testing and simulation
- Development: Create test MAC addresses for application development
- Virtual Machines: Generate MAC addresses for virtual machine configurations
- Network Configuration: Create MAC addresses for network device configuration
- Documentation: Generate example MAC addresses for documentation and tutorials
- Education: Learn about MAC address formats and structure
- Testing Tools: Create test data for network testing tools and scripts
- Database Seeding: Generate MAC addresses for populating test databases
What is a MAC address?
A MAC (Media Access Control) address is a unique identifier assigned to network interfaces for communications on a physical network segment. It is a 48-bit (6-byte) address typically represented as 12 hexadecimal digits, often formatted with separators like colons (e.g., 64:16:7F:7E:8D:6C).
What is a MAC address prefix?
A MAC address prefix is the first portion of a MAC address that you want to keep fixed. For example, if you specify "64:16:7F" as the prefix, the generated MAC addresses will start with these values, and the remaining digits will be randomly generated. The prefix must be an even number of hexadecimal digits (2, 4, 6, 8, 10, or 12 digits).
How many MAC addresses can I generate at once?
You can generate between 1 and 100 MAC addresses at once. Simply adjust the quantity field to specify how many MAC addresses you need. Multiple addresses will be displayed one per line.
What separators can I use?
You can choose from four separator options: colon (:), hyphen (-), dot (.), or none (no separator). The colon format (64:16:7F:7E:8D:6C) is the most common, but you can select the format that best suits your needs.
Can I generate MAC addresses in lowercase?
Yes! You can choose between uppercase (default) and lowercase formatting. The tool will generate MAC addresses in your selected case while maintaining the same hexadecimal values.
Are the generated MAC addresses truly random?
Yes, the generated MAC addresses use cryptographically secure random number generation (Web Crypto API) for the non-prefix portion. This ensures that the addresses are truly random and unpredictable.
What are MAC addresses used for?
MAC addresses are used for network identification, device management, network access control, troubleshooting, and various networking protocols. They uniquely identify network interfaces on local networks.
Can I use these MAC addresses in production?
Generated MAC addresses can be used for testing, development, and educational purposes. However, for production use, ensure you follow your organization's policies and network administration guidelines. Some MAC address ranges are reserved and should not be used.
Is my data stored or transmitted?
No, all MAC address generation happens entirely in your browser. Your prefixes, settings, and generated addresses are never sent to any server or stored anywhere. Everything is processed locally for complete privacy.
What happens if I enter an invalid prefix?
If you enter an invalid prefix (odd number of digits, non-hexadecimal characters, or more than 12 digits), the tool will display an error message. Make sure your prefix contains only valid hexadecimal characters (0-9, A-F) and has an even number of digits.
Can I generate MAC addresses without a prefix?
Yes! Simply leave the prefix field empty, and the tool will generate completely random MAC addresses. All 12 hexadecimal digits will be randomly generated.
What is the difference between uppercase and lowercase MAC addresses?
There is no functional difference between uppercase and lowercase MAC addresses - they represent the same hexadecimal values. The choice is purely aesthetic and depends on your preference or system requirements. Some systems or documentation prefer one format over the other.