Base converter
Binary, octal, dec, hex
Binary (2)
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Octal (8)
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Decimal (10)
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Hex (16)
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Custom base (36)
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Bitwise operations
Operands in decimal. Shifts: B = number of bits.
Binary
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Decimal
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Hex
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This tool converts an integer from one base into all the others at once: binary, octal, decimal, hexadecimal and a custom base of your choice between 2 and 36. Enter a value, pick its source base with one click, and instantly read its equivalents — handy for debugging low-level code, reading a hex color or understanding a network mask. A bitwise section rounds it off with AND, OR, XOR, NOT and left and right shifts.
Calculations rely on the browser's native big integers (BigInt), so they stay exact even for very large numbers, and run entirely locally: no data is sent, no tracking and no ads.
FAQ
How high can the base go?
From base 2 to base 36, using digits 0-9 then letters a-z as the extra symbols.
Are very large numbers supported?
Yes: the tool uses BigInt, so there is no precision limit like with ordinary floating-point numbers.
What are the bitwise operations for?
They manipulate a number's bits directly (masks, flags, shifts), common operations in systems and embedded programming.
Does conversion happen on a server?
No, everything is computed locally in your browser, with no network request at all.