Base Converter
Convert integers between bases 2–36.
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How it works
How it works
Numbers are interpreted in a given radix (base). Bases up to 36 use digits 0–9 and letters a–z to represent values 10–35.
parseInt(input, fromBase)converts the string to a JS Number;toString(toBase)emits in the new base.- Only integers are supported here; fractional conversion requires separate handling.
- JavaScript Numbers are IEEE‑754 doubles with 53‑bit integer precision; very large integers may lose precision.
Privacy & Security
All conversion occurs locally.
Accuracy, Limits & Tips
Only handles integers that fit in JS Number (53-bit precision).
Examples
- Hex ff to decimal 255.
- Binary 1010 to hex a.
Looking for broader guides and best practices? Visit the ToolsAreUs Blog for indexes (like the full tool list) and articles (e.g. secure password generation).