Base62 URL Shortener & Number Encoder
Convert base-10 integers into compact alphanumeric Base62 strings [0-9a-zA-Z] for URL shorteners and compact database IDs.
About This Tool
The Base62 URL Shortener & Number Encoder converts large decimal integer IDs into compact 62-character alphanumeric tokens (0-9, a-z, A-Z). It is the industry standard encoding for URL shorteners (like Bitly and TinyURL) and database primary keys.
Key Features
Encodes integers to compact Base62 strings [0-9a-zA-Z]
Decodes Base62 strings back to exact decimal BigInt values
Arbitrary precision BigInt support (handles large 64-bit and 128-bit integers)
Instant 1-click clipboard copy
How to Use
- 1Select Encode (Integer to Base62) or Decode (Base62 to Integer).
- 2Enter the decimal integer or alphanumeric Base62 string.
- 3View the compact shortened token.
Why Use ToolSnippet Base62 URL Shortener & Number Encoder?
Build custom URL shorteners (`example.com/aB3x`).
Compress numerical database IDs into short, URL-safe strings.
Obfuscate sequential database primary keys in public APIs.
Tips for Best Results
- Base62 is case-sensitive (has 62 distinct characters: 10 digits + 26 lowercase + 26 uppercase).
- Unlike Base64, Base62 does not use `+`, `/`, or `=` padding characters, making it completely URL safe without escaping.
Frequently Asked Questions
Why do URL shorteners use Base62 instead of Base64?
Base62 uses only alphanumeric characters [0-9a-zA-Z] without '+' or '/' symbols, making shortened links 100% URL-safe without requiring URL encoding.
How many unique IDs can a 6-character Base62 string hold?
A 6-character Base62 string provides 62^6 = 56,800,235,584 (56.8 Billion) unique identifiers.