Online Number Base Converter
Convert between binary, octal, decimal, hexadecimal and any base from 2 to 36. Supports fractions and huge integers, 100% private, all processing in your browser
Frequently Asked Questions
Any base from 2 to 36, including binary (2), octal (8), decimal (10), hexadecimal (16) and exotic bases like Base36. Letters are case-insensitive.
Yes. Fractions convert precisely to the target base (repeating fractions are truncated), negatives keep their sign, and huge integers never lose digits thanks to high-precision math.
No. All conversion happens locally in your browser. Your data never leaves your device, fully protecting your privacy.
Check that every character is valid in the source base β binary only accepts 0 and 1, hexadecimal accepts A-F, and so on. Letters may be typed in either case.
The right panel lists binary, octal, decimal and hexadecimal equivalents in real time. Click any row to make it the target base.
Completely free. This is a pure frontend online tool - no registration required, no payment needed, just open and use.
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