Binary to Base64 Converter [2025]

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Convert binary data (sequences of 0s and 1s) to Base64 encoding. Supports URL-safe Base64, grouping of input bits, and custom separators.

✓ URL-Safe Encoding✓ Input Bit Grouping✓ Custom Separators

Binary Input

Base64 Output

Key Features

  • Convert binary strings to Base64 encoded strings.
  • Supports both standard Base64 and URL-safe Base64 encoding.
  • Option to group input binary digits (bits) for improved readability (e.g., by 4 bits or 8 bits).
  • Customize the separator used in the *input* binary string (space, comma, newline, etc.). This makes it easier to paste in formatted binary.
  • Clear error messages for invalid binary input (e.g., non-binary characters).
  • Example data for quick testing.
  • Copy the encoded Base64 output to the clipboard.

Common Use Cases

Data Analysis

  • • Encoding binary data
  • • File format analysis
  • • Reverse engineering

Debugging

  • • Network traffic analysis
  • • Encoding binary data
  • • Low-level debugging

Development

  • • Working with binary data
  • • Encoding/decoding data
  • • System programming

Frequently Asked Questions

How do I input binary data?

You can enter binary data as a sequence of '0' and '1' characters. You can use spaces, commas, newlines, or other separators to format the input for readability; these will be ignored during the conversion. The input will automatically be padded to the nearest byte.

What is URL-safe Base64?

URL-safe Base64 replaces '+' and '/' with '-' and '_', making the encoded string safe for URLs.

Why group binary digits in the input?

Grouping makes long binary strings much easier to read and enter correctly. Common groupings are 4 bits and 8 bits (a byte). Grouping and separators affect only the *input* binary; the output Base64 is standard.

Is my data secure?

All processing is done client-side in your browser. No data is sent to a server.

Technical Details

Binary Input

The input should consist of a string of '0' and '1' characters, optionally separated by spaces, commas, newlines, or other user-defined separators.

Conversion Process

  1. Removes any non-binary characters ('0' or '1')
  2. Pads the input string with zeros to make its length a multiple of 8.
  3. Splits into octets.
  4. Converts each octet to its decimal representation.
  5. The octets are converted into a string.
  6. The string is then Base64 encoded using `btoa()`.
  7. If URL-safe encoding is selected, '+' and '/' are replaced with '-' and '_', and padding '=' characters are removed.

Byte Representation

Each group of 8 binary digits is treated as a single byte.

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