Number Base Converter

Convert an integer between binary, octal, decimal, and hexadecimal. BigInt precision, two's-complement for signed values, bulk mode. Nothing is uploaded, no sign-in, no tracking.

Mode

Single Bulk (one per line)

Input base Binary (base 2) Octal (base 8) Decimal (base 10) Hexadecimal (base 16) Base of your input. 0b/0o/0x prefixes and underscores accepted.

Two's complement (negatives) Auto — smallest fit 8-bit (−128 … 127) 16-bit (−32 768 … 32 767) 32-bit (±2.1 × 10⁹) 64-bit (±9.2 × 10¹⁸) Stored as two's-complement at this width. Positive values ignore.

Group digits every No grouping 2 digits 3 digits 4 digits 8 digits Each base grouped separately. Useful for binary-into-bytes or hex words.

Input

Binary base 2 Copy

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Octal base 8 Copy

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Decimal base 10 Copy

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Hexadecimal base 16 Copy

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Two's complement

Binary (stored): —

Hex (stored): —

One number per line Copy with the button below.

Copy TSV Clear —

Integers only. Past 2⁶³ − 1, paste as unsigned and ignore the two's-complement panel.