Number Base Converter
Convert integers between bases 2 through 64, including binary, octal, decimal, hex, Base58, and Base64. Uses BigInt for unlimited precision. Shows formatted output with nibble/byte spacing.
= Decimal 255
How it works
This number base converter runs entirely in your browser — no data is sent to any server. Simply fill in the fields above and the result updates instantly. You can copy the output with the copy button provided.
Frequently Asked Questions
What bases are supported?
All integer bases from 2 to 64, including Binary (2), Octal (8), Decimal (10), Hexadecimal (16), Base32 (32), Base36 (36), Base58 (Bitcoin, 58), and Base64 (64).
What is hexadecimal used for?
Hex is ubiquitous in computing: memory addresses, color codes (#FF5733), byte values, hash outputs (MD5, SHA256), and CPU instruction sets.
What is the difference between Base58 and Base64?
Base58 omits visually ambiguous characters (0, O, I, l) to prevent human transcription errors. Base64 uses the full 64-character alphabet and is designed for machine-to-machine data encoding.