What bases does this tool support as the target?

Any whole-number base from 2 to 36. Bases above 10 use the conventional base-36 digit set, where digits 10-35 are written as the uppercase letters A-Z.

Why is the maximum base 36?

Base 36 is the largest base representable with the standard digit alphabet of 0-9 followed by A-Z (36 total symbols); beyond that there's no universally agreed-upon digit set.

What does binary 11111111 look like in base 16 and base 36?

Binary 11111111 is decimal 255. In base 16 that's FF, and in base 36 it's 73 (since 255 = 7×36 + 3).

Is there a tool to go the other direction (any base to binary)?

Not in this batch — this is a one-directional converter. To go from a specific base back to binary, use that base's own dedicated converter if one exists (e.g. Hex to Binary Converter, Octal to Binary Converter) or convert through decimal.

Binary to Any Base Converter - Convert to Base 2-36

Overview

Introduction

Most binary converters only target one fixed base (octal, decimal, or hex), but sometimes you need to see a binary value in an arbitrary base — base 5, base 20, base 36, or anything in between.

This tool accepts a binary string and a target base from 2 to 36, then computes the exact converted value using arbitrary-precision arithmetic.

What Is Binary to Any Base Converter?

A general-purpose radix converter that turns any binary string into its representation in a target base you choose, from 2 (binary itself) up to 36.

Bases above 10 use the standard extended digit alphabet, where the letters A through Z stand in for the digit values 10 through 35.

How Binary to Any Base Converter Works

The binary input is validated and parsed as an exact BigInt using binary radix notation.

The value is then repeatedly divided by the target base: each division's remainder becomes the next output digit (rendered via a fixed 0-9/A-Z digit table), starting from the least significant digit. Reversing the collected digits produces the final result in the target base.

When To Use Binary to Any Base Converter

Use it when you need a binary value converted to an uncommon base that doesn't have its own dedicated converter, such as base 5, base 20, or base 36.

It's also useful for teaching or exploring how positional numeral systems generalize beyond the common bases 2, 8, 10, and 16.

Often used alongside Binary to Ternary Converter, Binary to Octal Converter and Binary to BCD Converter.

Features

Advantages

Supports the full practical range of bases (2-36) in a single tool.
Exact BigInt arithmetic avoids precision loss for long binary inputs.
Standard uppercase A-Z digit convention for bases above 10 matches what most other tools and languages use.

Limitations

Only converts FROM binary; there's no reverse direction in this tool (convert through decimal for other input bases).
Maximum supported base is 36, the conventional limit of the 0-9/A-Z digit alphabet.

Examples

Converting binary to base 16

Input

11111111 (target base 16)

Output

FF

Binary 11111111 is decimal 255, and 255 in base 16 is FF (15×16 + 15 = 255).

Converting binary to base 8

Input

11111111 (target base 8)

Output

Binary 11111111 is decimal 255, and 255 in base 8 is 377 (3×64 + 7×8 + 7×1 = 255).

Best Practices & Notes

Best Practices

Double-check the target base field before reading the output — the same binary input produces a very different-looking string in each base.
For very common target bases (octal, decimal, hex), consider using this category's or the Hex category's dedicated converters, which don't require setting a base field.

Developer Notes

Implemented with a manual BigInt-based radix-conversion loop (repeated division by BigInt(base), collecting remainders through a fixed 36-character digit table) rather than Number.toString(base), since long binary strings can exceed Number.MAX_SAFE_INTEGER.

Binary to Any Base Converter Use Cases

Converting binary values to uncommon target bases without a dedicated converter
Teaching or exploring positional numeral systems beyond the common bases
Verifying custom radix-conversion code against a precise reference implementation

Common Mistakes

Entering a target base outside the valid 2-36 range, which the tool rejects with a clear error.
Forgetting that digits above 9 appear as uppercase letters, and misreading a letter digit as part of a different number.

Tips

Try base 36 for the most compact possible textual representation of a large binary value.
Set the target base to 2 to confirm the tool echoes your binary input back unchanged, a handy sanity check.

Binary to Any Base Converter