OneFreePlace
FREE ONLINE TOOL

Free Base
Converter

All arithmetic uses BigInt numerator/denominator pairs. No IEEE-754 floating-point number is used to represent the value, so 64-bit IDs, hashes and long fractions are not silently rounded.

Open this tool in its own window ↗

FreeUse this tool without paying.No sign upStart with the tool right away.Clear stepsRead the tool’s own guidance.

About Free Base Converter

Convert exact integers and fractions between bases 2–62 with arbitrary precision. Handle huge values, repeating fractions, common prefixes, custom targets, exact rational verification, conversion steps, and signed two’s-complement views—without floating-point rounding.

Workspace options

  • Number
  • From base
  • Custom target base
  • Max fraction digits
  • Digit grouping
  • Bit width

Available actions

  • Converter
  • Steps / Integer
  • Batch
  • Guide
  • Convert
  • Swap with target