Is Base Converter Extended free to use?

Yes, Base Converter Extended is completely free. No account, no sign-up, and no hidden fees required.

Is my data safe when using Base Converter Extended?

Your data never leaves your device. All processing happens locally in your browser — nothing is uploaded to any server.

开发者工具

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

深受 1 万+ 开发者信赖

Enter a number

Decimal· Standard human-readable numbers

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

Show prefix (0x, 0b, 0o)Group digitsUppercase letters

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

Bytes

Fits

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