Save full tag backups as .mct or .bin files and write them onto blank cards.
Remove the original card and select "Write Tag" from the main menu. Load your newly saved dump file.
Note: Many modern smartphones use Broadcom NFC chips. These chips physically cannot read MIFARE Classic tags due to licensing restrictions. Ensure your phone uses an NXP NFC chip if you encounter connection errors. Understanding the MIFARE Classic Memory Layout
Help you safely.
: The tool includes a decoder to help users understand the complex "Access Bits" that control which keys (A or B) can read or write specific blocks.
If you need to download the specific 2.3.1 APK file, several websites host it. Notable sources include:
is the leading open-source Android application for reading, writing, and analyzing MIFARE Classic RFID tags. While the software ecosystem has moved toward newer system releases, version 2.3.1 remains a historically significant milestone for security researchers and hardware hobbyists. This specific iteration solidified the app's core data-mapping and dictionary-attack mechanics before later versions introduced radical UI changes and modernized Android SDK targeting. mifare classic tool 2.3.1
The app serves as a comprehensive interface for managing MIFARE Classic cards , which are widely used globally for public transit, building access, and parking.
Managing increment/decrement functions for cards used in credit or ticketing systems.
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. Save full tag backups as
MIFARE Classic Tool 2.3.1 is a foundational application in the world of NFC and RFID security research. Its comprehensive, low-level features provide a direct interface to the inner workings of MIFARE Classic tags. While its legitimate uses—like backing up access cards or managing IoT devices—are immense, its existence also serves as a stark reminder of the inherent vulnerabilities in the still-widely-deployed MIFARE Classic technology.
Whether you're a curious hobbyist looking to understand how your office access card works or a professional security researcher auditing a system, MIFARE Classic Tool is an indispensable, open-source, and privacy-respecting utility that puts the power of RFID analysis directly into your pocket.
Would you like a comparison with MCT Next, or help using a specific feature? Note: Many modern smartphones use Broadcom NFC chips
: It supports "dump-wise" writing to create clones of existing tags.