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Base62 to Binary Converter

Convert base62 alphanumeric strings to binary with detailed step-by-step derivation

Input Base62 Number

Base62 to Binary Conversion Principle

① Base62 → Decimal: Expand by place value (62^n)
② Decimal → Binary: Repeated division by 2, collect remainders
③ Use decimal as intermediate bridge for accurate conversion

Base62 uses 0-9, A-Z, and a-z (case-sensitive) to represent values 0-61. Converting to binary first converts to decimal as an intermediate step.

Base62 is case-sensitive! 'A' (value 10) is different from 'a' (value 36). Only use 0-9, A-Z, a-z characters.

What Is Base62 to Binary Conversion?

Base62 to binary conversion transforms a base62 (62-character) alphanumeric string into a binary (2-character) representation, using decimal as an intermediate bridge.

Base62 Character Set

0-9 (0-9), A-Z (10-35), a-z (36-61). 62 total characters, case-sensitive. Compact representation for large numbers.

Binary Character Set

0 and 1 only. 2 total characters. Fundamental in computer science and digital systems.

Place Value Expansion

Each digit d_i at position i (rightmost = 0) contributes d_i × 62^i to the decimal value. Sum all terms for total decimal.

Repeated Division

Divide decimal by 2, collect remainders. Read remainders from last to first to get binary result.

💡 Teaching Example: Convert base62 'z' to binary. 'z' = 61. Decimal 61 divided by 2: 61→30 rem1, 30→15 rem0, 15→7 rem1, 7→3 rem1, 3→1 rem1, 1→0 rem1. Remainders reversed: 111101.

Applications

URL Shorteners Database IDs Encoding Systems Web Development Computer Science

Frequently Asked Questions

What is base62 encoding?
Base62 is a positional numeral system with a radix of 62. It uses 0-9, A-Z, and a-z to represent values 0-61. Base62 is commonly used for URL shortening and compact identifiers.
How do I convert base62 to binary?
First convert base62 to decimal by expanding each digit by its place value (62^n), then convert the decimal result to binary using repeated division by 2 and collecting remainders.
What characters are used in base62?
Base62 uses digits 0-9 (0-9), uppercase letters A-Z (10-35), and lowercase letters a-z (36-61). Case-sensitive: A ≠ a with different values.
Why use base62 for URL shortening?
Base62 produces the shortest possible alphanumeric strings for large numbers, using both cases of letters, making it ideal for compact URLs and identifiers.

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