MAC Address Tools
Validate and reformat MAC addresses, and look up the OUI vendor prefix.
MAC address
Enter in any common notation
Formatted variants
Common separator styles
OUI & vendor
Organizationally Unique Identifier lookup
Vendor lookup uses a small built-in table of common prefixes and is not a full IEEE OUI database.
About the MAC Address Tools
Enter a MAC address in any common notation to validate it and see it reformatted with colons, dashes, or Cisco-style dots. Also shows the OUI (vendor prefix) bytes and a best-effort vendor name lookup.
Examples
Format MAC
001b6384 45e6Output
00:1B:63:84:45:E6Keyboard shortcuts
- Copy the main outputCtrl / ⌘ + Shift + C
- Download the resultCtrl / ⌘ + S
- Share this toolCtrl / ⌘ + Shift + S
- Reset the inputsAlt + R
- Open the tool search paletteCtrl / ⌘ + K
Related tools
Bulk File Downloader
Network & IP
Paste many URLs and save every file one by one, with a pause between downloads.
CIDR Range Expander
Network & IP
Expand a CIDR block into individual addresses, or compress a range into CIDR blocks.
IP & CIDR List Validator
Network & IP
Validate and normalise lists of IPv4, IPv6 and CIDR entries offline.
IP Converter
Network & IP
Convert IPv4 to decimal/hex/binary, and expand or compress IPv6.
IPv6 Expander/Compressor
Network & IP
Expand an IPv6 address to full form or compress it to shorthand.
Subnet Calculator
Network & IP
Calculate network, broadcast, host range, and mask from an IPv4 CIDR.
Frequently asked questions
Version 1.0.0 · Updated 2026-08-06 · Runs entirely in your browser