Number Base Converter

Convert numbers between any pair of bases without losing precision. Binary, octal, decimal and hexadecimal are always shown, plus a custom base of your choice and a byte-grouped binary view.

Settings

Value
Input base

Output

  • Binary · base 2
    11111111
  • Octal · base 8
    377
  • Decimal · base 10
    255
  • Hexadecimal (upper) · base 16
    FF
  • Hexadecimal (lower) · base 16
    ff
  • 8-bit groups · 8-bit
    11111111

Custom base

Target base
Output
73
Arbitrary-precision conversion using BigInt, so very large numbers stay exact.
All processing is done locally in your browser. Your images never leave your device.

How to use

  1. 1

    Enter the number you want to convert.

  2. 2

    Select the base it is currently written in.

  3. 3

    Read the conversions in every common base.

  4. 4

    Pick a custom target base for anything from 2 to 36.

Supported formats

Accepts

Produces

FAQ

Any base from 2 to 36, using the digits 0-9 followed by the letters a-z.

Yes. Conversion uses BigInt arithmetic, so results stay exact no matter how many digits you enter.

Yes. Common prefixes such as 0x, 0b and 0o are recognised and stripped automatically.

Yes. A leading minus sign is preserved through every conversion.

They split the binary result into bytes, which makes it much easier to read when working with flags or protocols.

About this tool: Number Base Converter

Binary, octal, decimal, hexadecimal — instantly

The Number Base Converter translates values between binary, octal, decimal and hexadecimal in real time — type a value in any base and every other base updates simultaneously, with bit-width context for programmers working with bytes and words.

Base confusion causes real bugs: 0x10 is sixteen, 010 is eight in many languages, and a binary mask typed as decimal corrupts flag logic. Seeing one value in all four notations at once removes the translation step where mistakes happen, whether you are reading memory dumps, setting permissions or debugging colour codes.

Conversion is instant, local and handles arbitrarily large integers with BigInt precision. Paste a hex string from a protocol document, read it in decimal, and copy the binary for your bit manipulation — all in one place.

Like every Piclizer tool, this one runs entirely in your browser — your files stay on your device.

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