🔢 Base Converter
Convert between 2 / 8 / 10 / 16 (extendable to 2-36) with BigInt support for numbers far beyond 53-bit precision. Handy for debugging and teaching: no upload.
❓ Frequently asked questions
How large can it handle?
Uses BigInt, limited only by browser memory - well beyond the 53-bit cap of normal numbers.
Letter case?
Output uses lowercase (a-f). Input is case-insensitive.
Why base 36?
Base 36 uses 0-9 plus a-z, ideal for compact short codes/IDs.
📚 How to use
Base conversion is common in debugging and encoding.
Steps
- Pick the from/to bases.
- Enter the number.
- Click "Convert".
About this tool
Numbers look different depending on who's reading them.
This converter switches between binary, decimal, hex and octal — the bases coders and engineers actually use. Type a value, pick from and to, read the result.
Handy when you're eyeballing a memory address, a color code, or a bitwise flag and your brain won't do the math.
All local, no upload, instant.
Privacy: nothing you type leaves the browser. (We run anonymous analytics — full story in our privacy policy.)
Quick one: hex is just base-16, so A–F stand in for 10–15. Once that clicks, the rest is easy. Enjoy.