About ADD Byte Cipher
ADD the input with the given key (e.g. fe023da5), MOD 255
Input: binary bytes. Output: binary bytes.
Format reference: ADD background and specification
Example
Use “Try example” to load this public sample and its settings, then run it.
Settings used in this example
| Parameter | Example value | Input and choices |
|---|---|---|
| Key | {"option":"Hex","string":"01"} | Key/text encoding: Hex, Decimal, Binary, Base64, UTF8, Latin1 |
Sample keys and passwords are public. Never use them to protect real data.
Result
base64
Av+A
Parameters
| Parameter | Default value | Input and choices |
|---|---|---|
| Key | {"option":"Hex","string":""} | Key/text encoding: Hex, Decimal, Binary, Base64, UTF8, Latin1 |
Before interpreting the result
Confirm the number base, delimiter and bit width before comparing results. Signed integers, byte strings and floating-point numbers have different representations and precision limits.
How to use this page
- Paste your input or open a local file.
- Adjust tool options if needed, then choose Run tool.
- Copy the result or download the original output bytes.
Inputs and results are not added to the public catalogue or saved in the URL. Processing happens in your browser; HTTP Request and DNS over HTTPS send the requests you explicitly run. Files up to 128 MiB can be opened; decompression and image tools may have smaller processing limits. Large results have a shortened preview. Text and HTML downloads use UTF-8; binary downloads preserve output bytes. Pasted text follows browser newline handling; open a file when exact input bytes matter.