FreeTool
Développement

Base Converter Extended

Convert numbers between any base — binary, octal, decimal, hex, Base32, Base36, Base58 (Bitcoin), Base62, and custom alphabets, with BigInt support, two's complement, and ASCII interpretation

Enter a number

Tip: you can use prefixes (0x, 0b, 0o), underscores, or spaces — they'll be ignored.

Conversions

Value: 255

Base 2

Binary

1111 1111

Base 8

Octal

377

Base 10

Decimal

255

Base 16

Hexadecimal

ff

Base 32

Base32

H7

Base 32 hex

Base32hex

7V

Base 36

Base36

73

Base 58

Base58

5Q

Base 62

Base62

47

Bit info

Bits

8

Bytes

1

Fits

u8

ASCII

int8int16int32int64uint8uint16uint32uint64

Two's complement (signed)

int160000 0000 1111 1111
int320000 0000 0000 0000 0000 0000 1111 1111

About these bases

  • Base32 (RFC 4648) — used in 2FA / TOTP secret keys (Google Authenticator, etc.)
  • Base36 — URL shorteners, short IDs (digits + a-z)
  • Base58 — Bitcoin addresses & IPFS hashes — removes visually ambiguous 0/O/I/l
  • Base62 — common for URL shorteners (case-sensitive, no special chars)
  • Supports arbitrarily large numbers via BigInt
  • All conversion happens locally in your browser

Vous ne trouvez pas ce qu'il vous faut ?

Nous créons des outils gratuits grâce aux retours de la communauté. Proposez l'utilitaire qui vous manque !

Base Converter Extended — Free Online Tool | FreeTool24 | FreeTool24