Enter a value and select Convert.
Result
Method and worked example
The entire base-10 integer is parsed as BigInt and formatted directly in base two. A leading minus sign remains outside the converted magnitude, so negative values use mathematical signed-magnitude notation rather than a bit-width-specific encoding.
Example
45₁₀ becomes 101101₂. The exact value 9007199254740993 becomes 100000000000000000000000000000000000000000000000000001₂ without rounding.
Limits and signed values
Only plain signed base-10 integer syntax is accepted. Values such as 1e6, 12.5, Infinity, NaN, and locale-formatted 1,000 are rejected. Input is limited to 15,000 decimal digits.
Safe, exact local processing
Input is handled as inert data and rendered with safe text nodes. No code is evaluated. Integer tools use arbitrary-precision BigInt instead of floating-point conversion, and the Binary Translator uses the browser’s UTF-8 byte APIs.