nfc-mfultralight - Man Page

MIFARE Ultralight command line tool


nfc-mfultralight r|w DUMP


nfc-mfultralight is a MIFARE Ultralight tool that allows one to read or write a tag data to/from a DUMP file.

MIFARE Ultralight tag is one of the most widely used RFID tags for ticketing application. It uses a binary Mifare Dump file (MFD) to store data for all sectors.

Be cautious that some parts of a Ultralight memory can be written only once and some parts are used as lock bits, so please read the tag documentation before experimenting too much!

To set the UID of a special writeable UID card, edit the first 7 bytes of a dump file and then write it back, answering 'Y' to the question 'Write UID bytes?'.


r | w Perform read from ( r ) or write to ( w ) card.


MiFare Dump (MFD) used to write (card to MFD) or (MFD to card)


Please report any bugs on the libnfc issue tracker at:


libnfc is licensed under the GNU Lesser General Public License (LGPL), version 3.
libnfc-utils and libnfc-examples are covered by the the BSD 2-Clause license.


Roel Verdult <>,
Romuald Conty <>.

This manual page was written by Romuald Conty <>. It is licensed under the terms of the GNU GPL (version 2 or later).


Nov 02, 2009 libnfc NFC Utilities