Swap Binary Endianness
Change endianness of a binary number. Runs entirely in your browser, so your data never leaves your device.
0 chars · 0 lines
Output
The result appears here as you type.
How to use Swap Binary Endianness
- 1. Paste your binary value. Enter a multi-byte binary value into the input pane, such as a 16-bit or 32-bit field copied from a memory dump or protocol capture.
- 2. Review the swapped bytes. The tool reverses the order of the value's bytes, converting between little and big endian layouts without changing the bits within each byte.
- 3. Copy the result. Copy the byte-swapped binary from the output pane into a protocol implementation, a file parser, or documentation comparing the two byte orders.
When to use Swap Binary Endianness
Swap Binary Endianness flips a multi-byte value's byte order, converting little endian to big endian or the reverse, whichever direction you need. Use it whenever data crosses between systems that store multi-byte values differently.
- Debugging a cross-architecture data mismatch. A value read correctly on one machine looks reversed on another, and you want to confirm the byte-swapped form matches what you expect from the source data.
- Implementing a file format's byte order. A binary file format specifies a particular endianness for its integer fields, and you are swapping test values to confirm your parser handles it correctly.
- Comparing values across a network protocol boundary. You captured a field from a network packet and want to see it in the opposite byte order to check against a reference implementation's expected value.
Examples
Swap a 16-bit value's bytes
Input
0000000100000010
Output
0000001000000001
Swap a single 32-bit value
Input
00000001000000100000001100000100
Output
00000100000000110000001000000001
About the Swap Binary Endianness tool
Swap Binary Endianness runs as plain JavaScript in your browser tab, with no server behind it. Change endianness of a binary number. Whatever you put in stays on your device from start to finish.
The tool is part of EditSafely's Binary Tools section, 112 single-purpose utilities built around the same idea: open the page, get the result, keep your data to yourself.
There is nothing to configure. Provide the input and the result appears on its own. 2 worked examples further down the page show exactly what the tool produces for real inputs.
That local-first design has practical benefits beyond privacy. The tool keeps working on a flaky connection once the page has loaded, results are instant because nothing round-trips to a server, and it is safe to use with confidential material.
Frequently asked questions
Is Swap Binary Endianness free to use?
Yes, it is completely free. All 2,658 tools on EditSafely work without an account, a subscription or usage limits.
Is it safe to paste sensitive or confidential data?
Everything happens locally. Your browser downloads the tool's code once, then does all the processing itself; nothing you enter is transmitted, stored or logged. You can even go offline after the page loads and it will still work.
How much text can I process at once?
There is no fixed limit. Because the work happens on your own device rather than on a shared server, the practical ceiling is your machine's memory, which comfortably handles inputs far larger than typical online tools allow.
Do I need to sign up or install anything?
No. The tool works in any modern browser on desktop, tablet or phone. There is no account to create, no extension to add and no software to install.
How do I use the result?
The output panel has a one-click copy button, and you can keep refining the input while you work; the result updates in place as you type.