Number Base Converter🔒 Processed on your device
Convert integers between bases 2–36, including big and negative numbers.
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How to use
Set the source and target bases, then type an integer. Bases 2–36 are supported; letters A–Z stand for 10–35. Do not add prefixes such as 0x or 0b. Positive and negative integers up to 10,000 digits are supported; fractions are not.
FAQ
How do I convert decimal to hexadecimal?
Choose 10 → 16, or click the 10→16 preset, and type the number. For example, 255 becomes FF.
Can it handle very large numbers?
Yes. It uses arbitrary-precision integers (BigInt), so numbers up to 10,000 digits convert exactly, without rounding.
Why is my input rejected?
Every digit must be valid in the source base — for example, 2 is not a binary digit — and prefixes such as 0x must be removed.