Hex to MAC Address Converter

May 2, 2026

Hex to MAC Address Converter

Convert raw hex, reversed dumps, and EUI-64 variants into clean MAC formats with live bit checks and prefix breakdowns.

📶Preset Scenarios

The parser strips separators, normalizes byte order, and can expand a 48-bit MAC into modified EUI-64 by inserting FFFE.

⚙Conversion Inputs

Source hex or MAC text Paste hex, spaced bytes, or any common MAC notation. Source style Lets the breakdown explain how the parser read it. Address family Choose the length and expansion rule to apply. Byte order Use reversed order for little-endian dumps. Output format Controls the final MAC layout shown in the result card. Output case Applies to the rendered MAC and hex strings. Padding mode Use this when the source is short or overlong. Prefix bytes Shows the vendor or interface prefix block. First octet rule Useful for checking unicast, multicast, and locally administered addresses.

Canonical MAC

selected format

Normalized output

Compact Hex

hex digits

No separators

Prefix Block

vendor span

First bytes shown

Bit Flags

I/G and U/L

Unicast or multicast

Full Breakdown

💻Format Spec Grid

48 bits

MAC-48

Six bytes, the classic hardware address form.

64 bits

EUI-64

Eight bytes, often derived from a MAC plus FFFE.

24 bits

OUI

Three-byte vendor prefix at the start of the address.

2 hex

Per byte

Each MAC byte is shown as two hexadecimal digits.

📈Reference Tables

Source Style	Example	Clean Bytes	Parser Note
Plain hex	A1B2C3D4E5F6	6 bytes	Raw digit stream
Colon pairs	A1:B2:C3:D4:E5:F6	6 bytes	Common MAC text
Dash pairs	A1-B2-C3-D4-E5-F6	6 bytes	Label friendly
Cisco dotted	A1B2.C3D4.E5F6	6 bytes	Four hex chars each
Spaced bytes	A1 B2 C3 D4 E5 F6	6 bytes	Easy to copy

Output Format	Layout	Example	Best For
Colon	AA:BB:CC	A1:B2:C3	Most tools
Dash	AA-BB-CC	A1-B2-C3	Labels
Dotted	AAAA.BBBB	A1B2.C3D4	Cisco style
Spaced	AA BB CC	A1 B2 C3	Logs
Compact	AABBCC	A1B2C3	Script use

Bit	Value	Meaning	Practical Read
I/G	0	Individual	Unicast address
I/G	1	Group	Multicast address
U/L	0	Universally unique	Factory burned in
U/L	1	Locally administered	Virtual or manual

Family	Length	Derived Rule	Typical Use
MAC-48	6 bytes	Direct format	Switches, NICs
EUI-48	6 bytes	Same layout	Generic 48-bit ID
Modified EUI-64	8 bytes	Insert FFFE	IPv6 interface ID
Raw EUI-64	8 bytes	Keep as is	Long form ID

Tip: Reverse bytes first when the source came from a little-endian dump.

Tip: Modified EUI-64 adds FFFE in the middle and flips the U/L bit.

This converter keeps the cleaning, byte order, and bit flags visible so you can spot reversed dumps, vendor prefixes, and locally administered addresses at a glance.

A MAC address is an unique identifier for a network interface. A MAC address consist of 48 bits, which is equivalent to six bytes. A MAC address may be represent in several formats, including as a raw dump of it’s content in hexadecimal, as a dotted format if it come from a Cisco device, or as a format that use colons to separate the bytes.

The raw dump of the address may contain a series of seemingly random character, but you can convert these into a more readable format for use in network scripts. Should a MAC address not be formatted correct before being used in a network script, the script may not correctly identify the network devices with the MAC address in a wrong order or format. A MAC address contains specific information in both the first three byte of the address and the remaining three bytes.

How to Read and Convert a MAC Address

The IEEE assigns the first three bytes of a MAC address as the Organizationally Unique Identifier (OUI), such as Cisco Systems or Intel. The last three bytes contains information that is specific to the device that was used to create the MAC address. Systems that use a little endian format will print the MAC address in a reversed order of its bytes.

To correctly print the MAC address, the bytes must be reversed. Additionally, the Ethernet address can be expanded to incorporate an 8-byte EUI-64 address for use with IPv6 by inserting the two byte FFFE in the MAC address and modifying some of the bit in the address. The first octet of a MAC address contains information regarding the type of MAC address that is contained within the address.

The least significant bit of the first octet can indicate whether a MAC address is unicast or multicast. A zero in this bit indicate a unicast address, and a one in this bit indicate a multicast address. The next bit can indicate whether a MAC address is universal or local.

A zero in this bit indicates that the MAC address is a universal address, meaning the vendor assigned it to the device. A one in this bit indicates a local address, meaning a person or network administrator set the address. Should these bit be incorrectly interpreted, the type of MAC address will be incorrectly identify.

A converter tool allow a person to normalize a MAC address so that it is easy to read. MAC addresses can have different type of separators, and the converter tool will strip these separators so that the MAC address can be processed correct. A converter tool can reverse the order of the bytes in a MAC address.

Additionally, the converter tool can add padding to short string of hexadecimal characters. Using a converter tool allow a person to view a MAC address to determine whether it is a multicast address or a local admin address. Additionally, the tool can display whether a MAC address has been expanded into an EUI-64 format.

Many people makes mistakes when troubleshooting a network by not considering the byte order in which a MAC address is printed. A MAC address that is printed in the reversed order will not recognize the MAC address of the vendor until the bytes are flipped into the correct order. Additionally, an EUI-64 address that has been modified will not function correct until the FFFE bytes are inserted into the address and the local bit is flipped.

A converter tool allow a person to perform these actions without having to perform the calculation necessary to perform these tasks. Thus, using a converter tool will ensure that a MAC address is properly normalized and that it is accurate when auditing the OUIs of network devices or cloning virtual network interface card.