MAC addresses show up written five different ways depending on the vendor tool you’re looking at — colons, hyphens, Cisco-style dots, or no separator at all. This tool validates any format and converts between all of them instantly.
What Is the MAC Address Validator & Generator?
This tool validates a 12-hex-digit MAC address, reformats it into colon, hyphen, dot, and bare notation simultaneously, decodes the two always-defined structural bits (unicast/multicast and universal/locally-administered), and can generate a random, correctly-flagged MAC address.
How to Use It
- Open the tool at /tools/mac-address-tool.
- Paste a MAC address in any common format — separators are stripped automatically.
- See all four reformatted versions plus the decoded properties.
- Click “Generate random MAC” for a randomly generated, locally-administered address.
Key Features
- Format-agnostic input — colons, hyphens, dots, or no separators are all accepted and reformatted into every style at once.
- Structural bit decoding for unicast/multicast and universal/local administration, per the IEEE 802 MAC address spec.
- Random MAC generator that correctly sets the locally-administered bit, matching the convention used by VMs and MAC-randomization features.
- Honest scope — it doesn’t claim to identify the vendor from the OUI, since that requires IEEE’s full, regularly-updated registry.
When to Use This Tool
- Converting a MAC address between formats required by different tools or vendor documentation.
- Debugging network configs where the MAC address format doesn’t match what a tool expects.
- Generating a safe placeholder MAC address for testing or documentation.
Try It Now
Open MAC Address Validator & Generator directly, or press ⌘K and type the tool name from anywhere on the site.
Part of the Network Tools collection on WebdevToolbox — free, browser-based developer tools with no login required.