--- name: "rax2" section: "1" platform: "linux" package: "radare2" version: "6.2.2-1" release: "Arch Linux 2026-11-01" platforms: ["linux"] url: "https://new.carta.tech/rax2" --- # rax2(1) Radare2 Base Converter ## NAME **rax2** – Radare2 Base Converter ## SYNOPSIS **rax2** \[**-abcCdDeEfFhHijkKnoqrsStuUvwxXzZ**\] \[\[expr\] ...\] ## DESCRIPTION A versatile calculator for numerical base conversions, string encoding/decoding, and data representation within Radare2, supporting C-string encoding, hexpairs, Base64, and other formats. The most common numerical bases include binary (base 2) for direct machine code interaction, hexadecimal (base 16) for memory addresses and compact data representation, and decimal (base 10) for human-readable calculations and interpretations. ## OPTIONS - **-a** Show ASCII table - **-b** *base* Force output mode (numeric base) f floating point\ 2 binary\ 3 ternary\ 8 octal\ 10 decimal\ 16 hexadecimal When used with **-s** and **-e**, select the word size in bits for endian-swapping hex input. Valid word sizes are 8, 16, 32, and 64 bits. - **-c** Show hexadecimal C string from integer value - **-C** Dump stdin to C array in stdout (xxd replacement) - **-d** Print the result in decimal (base 10) - **-D** Decode the input data using base64 - **-e** Swap endianness. With **-s**, requires **-b** to specify the word size. - **-E** Encode the input data using base64 - **-f** Interpret the input number as a 32bit dword and display it using IEEE 754 standard for floating point arithmetic - **-F** Read C strings from stdin and output in hexpairs. Useful to load shellcodes - **-h** Show usage help message - **-H** Convert a string into a hash - **-i** Convert LONG to/from IP ADDRESS - **-j** Show the output in json format, the same as the r2 \`?j 0x804\` command - **-k** Keep the same base as the input data - **-K** Show randomart key asciiart for values or hexpairs - **-n** Append newline to the decoded output for human friendliness - **-o** Convert from octal string to char (rax2 -o 162 62) - **-q** Be quiet. Show less information or drop the superfluous details in the output - **-r** Show the same output as the r2's \`? 0x804\` command. When combined with -S (-rS) it will print r2 commands to write the actual binary into radare2 - **-s** Convert from hex pairs string to character (rax2 -s 43 4a 50) - **-S** Convert from character to hex string (rax2 -S C J P) - **-t** Convert epoch timestamp to human readable date format - **-u** Convert given value to human readable units format - **-v** Show version information - **-w** Display the result as 16bit signed integer value - **-x** Show hexpairs from integer value - **-X** Convert a bit stream (an arbitrary sequence of 0 and 1 of any length) to hexadecimal. The result can be larger than 64bits - **-z** Convert from character string to binary (rax2 -z hello) - **-Z** Convert from binary string to string (rax2 -Z 01000101) ## USAGE Available variable types are: int -\> hex rax2 10\ hex -\> int rax2 0xa\ \-int -\> hex rax2 -77\ \-hex -\> int rax2 0xffffffb3\ int -\> bin rax2 b30\ int -\> ternary rax2 t42\ bin -\> int rax2 1010d\ ternary -\> int rax2 1010dt\ float -\> hex rax2 3.33f\ hex -\> float rax2 Fx40551ed8\ oct -\> hex rax2 35o\ hex -\> oct rax2 Ox12 (O is a letter)\ bin -\> hex rax2 1100011b\ hex -\> bin rax2 Bx63\ ternary -\> hex rax2 212t\ hex -\> ternary rax2 Tx23\ raw -\> hex rax2 -S \< /binfile\ hex -\> raw rax2 -s 414141 ## EXAMPLES With no arguments, rax2 reads values from stdin. You can pass one or more values as arguments. $ rax2 33 0x41 0101b\ 0x21\ 65\ 0x5 You can do 'unpack' hexpair encoded strings easily. $ rax2 -s 41 42 43\ ABC Swap the byte order of each 32-bit word in a hex stream: $ printf 1122334455667788 \| rax2 -esb 32 \| rax2 -S\ 4433221188776655 It supports some math operations: $ rax2 1+1 "0x5\*101b+5"\ 2\ 30 Encode and decode binary file using base64: $ rax2 -E \< /bin/ls \> ls.b64\ $ rax2 -D \< ls.b64 \> ls $ cmp /bin/ls ls && echo $?\ 0 Use -z/-Z to convert between binary and string: $ rax2 -z hello\ 01101000011001010110110001101100011011110000000000000000\ $ rax2 -Z 01101000011001010110110001101100011011110000000000000000\ hello Hash strings: $ rax2 -H linux osx\ linux: 0x5ccc1772\ osx: 0x099bf94f Work with IP addresses: $ rax2 -i 127.0.0.1\ 0x0100007f\ $ rax2 -i 0x0100007f\ 127\.0.0.1 It is a very useful tool for scripting, so you can read floating point values, or get the integer offset of a jump or a stack delta when analyzing programs. ## ENVIRONMENT rax2 does not use any environment variables. ## SEE ALSO [radare2(1)](/radare2/1.md) ## WWW https://www.radare.org ## AUTHORS pancake \