Universal Base Converter
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Universal Converter
Base 2-36
Input value
Input base
Tip: supports negative numbers. For bases > 10 use 0-9 and A-Z.
Binary (base 2)
Copy
Octal (base 8)
Copy
Decimal (base 10)
Copy
Hex (base 16)
Copy
Custom base
Copy
Group binary by
No grouping
4
8
Grouping applies to binary output blocks.
Decimal ⇄ Binary
Decimal
Binary
Decimal ⇄ Hex
Decimal
Hex
Binary ⇄ Hex
Binary
Hex
Text ⇄ Hex / Binary
Text
To Hex
To Binary (8-bit)
Clear
Hex
Hex → Text
Copy
Binary (8-bit)
Binary → Text
Copy
Note: uses UTF-16 code units for broad compatibility.
Two’s Complement
Bit width
8
16
32
64
Range: −(2^(n−1)) … 2^(n−1)−1
Signed decimal → binary
Encode
Binary (n bits) → signed decimal
Decode
Spaces/underscores in binary are allowed.
© FujiBit · Works offline · Large integers supported via BigInt