.NET Integer/Number Obfuscator

.NET number obfuscationis the practice of representing numeric literals in C# code in forms that are functionally equivalent but visually different from the plain decimal representation. Instead of writing "65535" directly, an obfuscated form might be "0xFFFF", "unchecked((short)0x10000 - 1)", or "Convert.ToInt32("FFFF", 16)". The obfuscated expression evaluates to the same numeric value at runtime but is significantly harder to recognize in decompiled .NET assemblies.

Our .NET number obfuscator generates multiple disguises for any numeric value using 10+ distinct techniques spanning base conversion, arithmetic expressions, bitwise operations, Convert.ToInt32/64 calls, unchecked integer arithmetic, type-suffixed literals, and prime factor decomposition. Each technique is displayed with an explanation of how it works in the .NET runtime and its character length, helping you choose the right level of obfuscation. All processing runs locally in your browser with no data sent to any server.

1. 1. Enter a Number: Type any integer or decimal number into the input field. Optionally select the target .NET type (int, long, float, decimal) to see type-specific obfuscation variants such as type suffixes (L, F, M, D) and unchecked casts.
2. 2. Automatic Multi-Technique Generation: As you type, the tool generates obfuscated C# forms using 10+ techniques. Base conversion shows the number in hex (0xFF) and binary (0b11111111). Arithmetic expressions use addition, subtraction, and multiplication. Bitwise operations apply double bitwise NOT [~(~n)], XOR zero (n^0), shift zero (n<<0), and OR zero (n|0). Convert.ToInt32/64 encodes the number as a hex string. Prime factor decomposition finds the prime product. Toggle options to include unchecked expressions, complex expressions, and type suffixes.
3. 3. Compare and Copy: Each obfuscated form is displayed in a card with its technique name, character length, and an explanation of the technique. The shortest variant is highlighted in the stats panel. Click the Copy button next to any variant to use it in your C# source code.

• Base Conversion (Hex & Binary): The most common obfuscation technique in C#. Hexadecimal (base 16) uses 0-9 and A-F with a 0x prefix, making 65535 become 0xFFFF. Binary (base 2) uses 0-1 with a 0b prefix (C# 7.0+). These literals are evaluated at compile time and produce identical IL.
• Arithmetic & Bitwise Expressions: Represent a number as the result of an operation like addition (32767+32768), multiplication (3*5*17*257), or double bitwise NOT [~(~n)]. The C# compiler evaluates constant expressions at compile time, so there is zero runtime overhead compared to the plain literal.
• Convert.ToInt32/64:Wraps the number as a hexadecimal string inside a Convert.ToInt32("FFFF", 16) call. The conversion happens at runtime, making it harder for static analysis to determine the value. The hex string itself can be further obfuscated.
• Type Suffixes & unchecked: Appends C# type suffixes (L for long, F for float, M for decimal, D for double) or wraps in unchecked expressions that generate the value through overflow arithmetic, producing the same bit pattern.

The .NET number obfuscator is 100% free with no signup required. All number processing is performedlocally in your browser using client-side JavaScript - your numbers, obfuscated expressions, and analysis resultsnever leave your device. There areno usage limits or rate caps. The tool generates 10+ obfuscation techniques for any numeric value, provides per-variant copy buttons, shortest variant identification, and detailed technique explanations specific to .NET/C# syntax. Use it as many times as you need for code obfuscation, education, or experimentation.