---
name: "radiff2"
section: "1"
platform: "linux"
package: "radare2"
version: "6.2.2-1"
release: "Arch Linux 2026-11-01"
platforms: ["linux"]
url: "https://new.carta.tech/radiff2"
---

# radiff2(1)

**radiff2** – Binary Diffing Utility

## SYNOPSIS

**radiff2** \[**-abcCdDehiJjlmnoOprqsStuUvVxXzZ**\] \[**-A** \[A\]\] \[**-B** *addr*\] \[**-g** *sym*\] \[**-m** *mode*\] \[**-o** *offset*\] \[**-l** *length*\] \[**-t** *%*\] \[**-S** *name*\] *file1* *file2*

## DESCRIPTION

A utility for diffing binary code and data within the Radare2 suite, supporting architecture and bits specification, delta diffing, and graph-based comparisons.

It supports a wide range of formats and features, including architecture and bits specification, delta diffing, graph diffing, and more.

## OPTIONS

- **-a** *arch*

  Specify architecture plugin to use (x86, arm, etc.).

- **-A** \[A\]

  Run aaa or aaaa after loading each binary (see -C).

- **-b** *bits*

  Specify register size for architecture (16 (thumb), 32, 64, etc.).

- **-B** *addr*

  Define the base address to add the offsets when listing.

- **-c** *cmd*

  Run an r2 command on every RCore instance created.

- **-C**

  Graphdiff code (columns: off-A, match-ratio, off-B) (see -A).

- **-d**

  Use delta diffing.

- **-D**

  Show disasm instead of hexpairs.

- **-e** *k=v*

  Set eval config var value for all RCore instances.

- **-f** *format*

  Select output format (see -f help for details).

- **-g** *sym*

  Graph diff of \[sym\] or functions in \[off1,off2\].

- **-i** *type*

  Compare bin information (imports, exports, symbols, sections, etc.). See -i help for details.

- **-j**

  Output in JSON format.

- **-l** *len*

  Specify final offset (length) for diffing, can use A:B format to specify different lengths for each file.

- **-m** *mode*

  Choose the graph output mode (aditsjJ). See -m help for details.

- **-n**

  Count number of changes.

- **-o** *offset*

  Specify initial offset for diffing, can use A:B format to specify different offsets for each file.

- **-O**

  Code diffing with opcode bytes only.

- **-p**

  Use physical addressing (io.va=false) (only for radiff2 -AC).

- **-q**

  Quiet mode (disable colors, reduce output).

- **-r**

  Output in radare commands.

- **-s**

  Compute edit distance (no substitution, Eugene W. Myers O(ND) diff algorithm).

- **-ss**

  Compute Levenshtein edit distance (substitution is allowed, O(N^2)).

- **-S** *name*

  Sort code diff (name, namelen, addr, size, type, dist) (only for -C or -g).

- **-t** *%*

  Set threshold for code diff (default is 70%).

- **-T**

  Analyze files in threads (EXPERIMENTAL, 30% faster and crashy).

- **-u**

  Unified output (---+++).

- **-U**

  Unified output using system 'diff'.

- **-v**

  Show version information.

- **-V**

  Be verbose (current only for -s).

- **-x**

  Show two-column hexdump diffing.

- **-X**

  Use xpatch format for the diffing output.

## ENVIRONMENT

No environment variables are used.

## GRAPH OUTPUT FORMATS (-m \[mode\])

- **-a**

  ASCII art (default).

- **-s**

  r2 commands.

- **-d**

  Graphviz dot.

- **-g**

  Graph Modelling Language (GML).

- **-j**

  JSON.

- **-J**

  JSON with disassembly.

- **-k**

  sdb key-value.

- **-t**

  Tiny ASCII art.

- **-i**

  Interactive ASCII art.

## USAGE EXAMPLES

- Comparing two binaries

  $ radiff2 bin1 bin2

- Using graph diffing to compare functions by name

  $ radiff2 -g main bin1 bin2

- Counting the number of changes between two binaries

  $ radiff2 -n bin1 bin2

- Outputting the diff in a unified format

  $ radiff2 -u bin1 bin2

- Comparing the opcodes of two functions

  $ radiff2 -O bin1 bin2

- Compare specific sections of binaries with custom offsets

  $ radiff2 -o 0x1000 bin1 bin2

- Compare different sections with different offsets

  $ radiff2 -o 0x1000:0x2000 bin1 bin2

- Compare specific lengths from given offsets

  $ radiff2 -o 0x1000 -l 0x500 bin1 bin2

## RADARE2 COMMANDS

The 'c' command in r2 is used for various comparison operations within data inside the same file. Here are some examples of its usage:

- Compare a plain string with escaped chars

  c "string to compare"

- Compare byte at a specific address with current offset

  c1 0x100

- Compare block size bytes from current offset and the 0x100 offset

  cc 0x100

- Unified diff of disassembly from current seek and given address

  cud 0x200 @ 0x100

- Compare memory hexdumps in unified diff format

  cu 0x100 @ 0x200

For more detailed usage of the 'c' command, refer to the \`c\[?dfx\] \[argument\]\` help section.

## SEE ALSO

[radare2(1)](/radare2/1.md)

## WWW

https://www.radare.org/

## AUTHOR

pancake \<pancake@nopcode.org\>