Mifare Classic Tool 2.3.1 Updated Jun 2026

Users can write specific data to blocks. This includes "Value Blocks" for credit-based systems and the "Manufacturer Block" (Block 0) on special "Magic" Chinese CUID cards.

The tool allows users to perform several technical operations directly from an NFC-enabled smartphone:

Mifare Classic Tool 2.3.1 offers a range of features that make it a powerful and versatile tool for working with Mifare Classic cards. Some of its key features include:

Using MCT 2.3.1 to clone a transit card for free rides, break into a building you do not own, or duplicate a hotel key without authorization is or theft of service in most jurisdictions (Computer Fraud and Abuse Act in the US; Computer Misuse Act in the UK).

: Use it to check if your own systems are safe. mifare classic tool 2.3.1

: The NFC chip inside your phone must be made by NXP. Broadcom NFC chips cannot read MIFARE Classic cards. Android OS : It runs on most modern Android devices. Safe and Legal Use This tool is very powerful. You must use it responsibly. Own Devices : Only scan cards that belong to you.

MIFARE Classic security relies on 48-bit keys (Key A and Key B). Version 2.3.1 includes an updated extended-std.keys dictionary file. This contains standard factory default keys and common industry configurations to speed up sector cracking. 2. Precise Value Block Formatting

MCT cannot execute complex cryptographic attacks like the "Darkside" or "Nested" attacks. It is a reader/writer tool. To break unknown keys, you must first sniff or crack the keys using dedicated hardware like a Proxmark3 or Flipper Zero, then import those keys into MCT. Ethical and Legal Compliance

MCT allows for writing data back to tags on a block-by-block basis. Its powerful cloning feature enables a complete dump from one tag to be written onto another tag, effectively creating an exact clone. The app also includes a "Quick UID clone feature" for specialized, writable "magic" cards. Users can write specific data to blocks

Many closed-loop payment systems (like laundromats or arcade tokens) store balances using a specific format called "Value Blocks." MCT includes a dedicated analyzer to decode, check the integrity of, and format these value blocks easily. Step-by-Step Guide: Reading a Tag with MCT 2.3.1

MCT 2.3.1 cannot run on just any mobile device due to hardware dependencies:

MIFARE Classic Tool (MCT) is the premier Android application for analyzing, reading, and writing MIFARE Classic RFID tags. Version 2.3.1 delivers critical stability updates and optimized NFC controller mapping for modern Android devices. What is MIFARE Classic Tool 2.3.1?

Always create a full dump of a card before attempting to write data. Writing incorrect data to the "Trailer Block" (the last block of any sector) can permanently lock that sector if the keys are overwritten with unknown values. Some of its key features include: Using MCT 2

This function scans the card and displays the data stored in its 16 sectors (for 1K cards) or 40 sectors (for 4K cards).

Because MIFARE Classic Tool can be used to bypass security measures or manipulate balances, its use should be restricted to educational purposes or on hardware you own. You can find the application on platforms like for the open-source version or the Google Play Store specific technical vulnerabilities of the MIFARE Classic encryption or how to format a dictionary file for the tool? MIFARE type identification procedure - NXP Semiconductors

: Users can manage "dictionary" files containing potential keys to unlock encrypted sectors Data Analysis

: The app itself cannot "hack" or brute-force unknown keys due to Android's slow NFC protocol; you must provide the keys via a dictionary file.