Notes on file extensions

The Proxmark3 client uses a wide range of files. Here is a brief recap to get you up to speed.

extension	description
.exe	windows executable
.bin	binary file, can be firmware or memory dump of a tag
.eml	text file, with memory dump of a tag
.mfd	binary file, usually created with Mifare Classic Tool app (MCT), contains memory dump of tag. Very similar to .bin file
.json	JSON file, usually settings file or it can also be a memory dump of a tag
.dic	dictionary file. textual, with keys/passwords one line / key
.elf	binary proxmark3 device firmware file.
.cmd	text file, contains proxmark3 client commands used to call client with -s
.lua	text file, contains lua script to be run inside client. or called with -l
.pm3	text file, with numbers ranging 0-255 or -127 - 128. Contains trace signal data for low frequency tags (data load)
.trace	binary file, contains trace log data usually from high frequency tags. (hw trace load)