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 1111Base 8
Octal
377Base 10
Decimal
255Base 16
Hexadecimal
ffBase 32
Base32
H7Base 32 hex
Base32hex
7VBase 36
Base36
73Base 58
Base58
5QBase 62
Base62
47Bit info
Bits
8
Bytes
1
Fits
u8
ASCII
—
Two's complement (signed)
0000 0000 1111 11110000 0000 0000 0000 0000 0000 1111 1111About 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
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