TrueDiffing
binary · text · function & string diff
Diff two files and see exactly what changed - function by function, instruction by instruction.
Free 7-day trial · Windows 10 / 11 · 64-bit
See it in action
Every changed function, down to the instruction
Two builds compared: the function list on the left marks what was added, removed and modified, and the right-hand pane shows the selected function as an instruction-level diff - opcode bytes and disassembly, primary against secondary.
Control flow
The same function, old against new
Switch a modified function from code to graph and the basic blocks and branches are drawn primary and secondary side by side, each block coloured unchanged, modified, new or gone - so a rewritten branch is obvious at a glance.
Why TrueDiffing
Everything you need to see what changed
From a function-level binary diff across two architectures and two container formats to a plain line-by-line text diff - with a self-contained report at the end of it.
Function-by-function binary diff
Compares two compiled binaries and lists every added, removed and modified function, each with its opcode bytes and its disassembly.
Instruction-level diff
A modified function is broken down instruction by instruction, so you see the exact lines that were added and removed inside it - not just that it changed.
Flow graph view
The same function drawn as its basic blocks and branches. For a modified function the old and new graphs sit side by side, each block coloured unchanged, modified, new or gone.
PE and ELF containers
Reads Windows PE/MZ and Linux ELF binaries, so the same tool covers both sides of a cross-platform target.
Intel and ARM
Disassembles x86 and x64 alongside ARM and ARM64, Thumb included, through the Capstone engine.
Line-by-line text diff
Point it at two text files and get added, removed and modified lines with old and new line numbers - blank-line-move aware, and whitespace-insensitive by option.
Self-contained HTML report
Export either view to a single HTML file that carries the whole diff with it - flow graphs included as inline SVG - so a result travels as one attachment.
Search and filter
Search functions by name and filter the list down to the classes you care about - modified, new, removed or unchanged - to cut thousands of functions to the handful that matter.
Strings, side by side
A dedicated strings view diffs the two files' string tables next to the function list, so a new URL, path or message shows up as plainly as a new function.
Auto-detects the mode
Drop in two files and TrueDiffing picks binary or text on its own - or pin the mode yourself when you want the other reading.