---
name: "nfc-mfultralight"
section: "1"
platform: "linux"
package: "libnfc"
version: "1.8.0-4"
release: "Arch Linux 2026-11-01"
platforms: ["linux"]
url: "https://new.carta.tech/nfc-mfultralight"
---

# nfc-mfultralight(1)

MIFARE Ultralight command line tool

## NAME

nfc-mfultralight - MIFARE Ultralight command line tool

## SYNOPSIS

**nfc-mfultralight** **r**\|**w** *DUMP*

## DESCRIPTION

**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?'.

## OPTIONS

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

- *DUMP*

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

## BUGS

Please report any bugs on the **libnfc** issue tracker at:\
 **https://github.com/nfc-tools/libnfc/issues**

## LICENCE

**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.

## AUTHORS

Roel Verdult \<roel@libnfc.org\>, \
 Romuald Conty \<romuald@libnfc.org\>.

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