How to use
Select input and output bases, paste an integer and convert. Negative values and matching 0b, 0o and 0x input prefixes are supported. Output has no prefix.
Example
Decimal 255 → hexadecimal FF → binary 11111111.
NUMBER BASE CONVERTER
Number Base Converter
Convert integers exactly between binary, octal, decimal and hexadecimal.
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Keep in mind
BigInt preserves integer precision. Input supports up to 4,096 digits. Fractions, scientific notation and fixed-width two’s-complement conversion are not supported.
Common questions
Why is 102 invalid as binary? Binary uses only 0 and 1. Invalid digits are rejected rather than partially parsed.