Base58 Encoder and Decoder [2025]

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Convert text and binary data to and from Base58 format. Used in Bitcoin addresses and other applications where avoiding similar-looking characters (0, O, l, I) is important.

✓ Bitcoin Compatible✓ Unicode Support✓ Error Detection

Text Input

Base58 Output

About Base58

Base58 is a binary-to-text encoding scheme designed to be readable and safe for humans. It's similar to Base64 but avoids characters that might look ambiguous when printed: 0 (zero), O (capital o), l (lowercase L), I (capital i), and symbols + and /.

This encoding is primarily used in Bitcoin addresses, where it helps prevent transcription errors. The alphabet consists of numbers (1-9) and letters (A-Z, a-z), excluding the aforementioned ambiguous characters.

Key Features

  • Encode text and binary data to Base58 format
  • Decode Base58-encoded content back to its original form
  • Support for Unicode text and binary data
  • Validation of Base58 input characters
  • Option to preserve or reject invalid characters
  • Compatible with Bitcoin address encoding
  • Copy results to clipboard with a single click
  • Example presets for quick testing

Common Use Cases

Cryptocurrency

  • • Bitcoin addresses
  • • Private keys
  • • Wallet imports
  • • Address validation

Development

  • • Data encoding
  • • Key generation
  • • ID systems
  • • File checksums

General Use

  • • URL shortening
  • • Reference codes
  • • Serial numbers
  • • Manual entry data

Frequently Asked Questions

What is Base58?

Base58 is a binary-to-text encoding format that represents data using 58 different ASCII characters. It excludes characters that are easily confused with one another: 0, O (capital o), l (lowercase L), I (capital i), and symbols + and /.

Why use Base58 instead of Base64?

Base58 is designed for human readability and manual transcription. By avoiding easily-confused characters and special symbols, it reduces the chance of errors when people need to type or write down encoded data.

Is this the same encoding Bitcoin uses?

This tool uses the same Base58 alphabet as Bitcoin, but Bitcoin addresses also use Base58Check, which adds error detection. For simple Base58 encoding/decoding of text and data, this tool is perfect.

What data can be encoded?

Any text or binary data can be encoded. This includes Unicode text, binary files, or any other data. The tool automatically handles the conversion between text and the binary data needed for Base58 encoding.

Technical Details

Base58 Alphabet

The Base58 alphabet consists of:

  • • Numbers: 1-9
  • • Uppercase letters: A-H, J-N, P-Z
  • • Lowercase letters: a-k, m-z

Encoding Process:

  1. Convert input data to bytes
  2. Convert bytes to a large integer
  3. Repeatedly divide by 58 and collect remainders
  4. Map remainders to Base58 alphabet
  5. Handle leading zeros appropriately

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