Number System Converter

Start by choosing the base your input is written in. The converter accepts binary, octal, decimal, and hexadecimal, and it also recognizes standard prefixes such as 0b, 0o, and 0x.

Before conversion, the tool trims whitespace, removes underscore separators, and validates that every character belongs to the selected base. If the input contains invalid digits, the tool shows a clear error instead of producing a misleading result.

Conversion engine

The value is parsed into a BigInt so the result stays exact even for very large integers. That avoids the precision loss that can happen with ordinary floating-point number handling.

Once parsed, the same integer is formatted into all supported bases. Decimal, binary, octal, and hexadecimal are derived from the exact same value, so every output stays synchronized.

Formatting options

Digit grouping makes long values easier to read. Binary is grouped in 4-bit chunks, octal in 3-digit chunks, and hexadecimal in 2-digit chunks.

You can also switch hexadecimal output between uppercase and lowercase to match the style used in code, logs, or specifications. This is especially useful when copying values into source code or documentation.

Output details

Along with the converted values, the tool also shows bit length and byte length for quick technical inspection. That helps when checking bitmasks, packet data, IDs, and other integer-based values.

Each converted representation is easy to copy, so you can paste the exact format you need into an editor, terminal, spreadsheet, or debugging session.