Number Base Converter

Key features

• Six bases rendered simultaneously: binary (2), octal (8), decimal (10), hexadecimal (16), base 32 and base 36.
• BigInt arithmetic — numbers far beyond 2⁵³ convert with no overflow or precision loss.
• A bit-length readout (“13 bits in binary”) plus a note confirming unsigned integer maths.
• Forgiving input: spaces and underscores are ignored, letters are case-insensitive, and digits invalid for the chosen base raise a clear error.
• A cycle button walks the input base through 2 → 8 → 10 → 16 for quick comparisons.
• Individual copy buttons on every result card.

How it works

1. 1

   Enter a value

   Any non-negative integer in the current input base — e.g. 2025, ff or 1010.

2. 2

   Choose the input base

   Pick base 2/8/10/16/32/36 from the selector, or tap the cycle button to step through the common ones.

3. 3

   Read all six bases

   Every output updates live; your chosen input base is highlighted in the grid.

4. 4

   Copy what you need

   Each base card has its own copy button.

Tips for better results

• 💡Hex colours: type 1f1f1f with base 16 selected to get the decimal equivalent instantly.
• 💡Use underscores or spaces to group long binary strings — they're stripped before parsing.
• 💡Base 32 and base 36 pack big numbers into short, typeable strings (digits 0–9 plus a–z) — handy for compact IDs.
• 💡Fractions and negative numbers are out of scope: the tool is strictly unsigned integers, which is exactly what keeps BigInt results exact.

Frequently asked questions