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Base64 to Binary

Paste a Base64 string and convert it to binary — each decoded byte shown as an 8-bit binary number.

Last updated: May 29, 2026

Client-Side Processing
Input Data Stays on Device
Instant Local Execution
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What is Base64 to Binary?

Base64 to Binary decodes a Base64-encoded string to its underlying bytes and then represents each byte as an 8-bit binary number (e.g., 01001000). This is useful for analyzing encoded data at the bit level, debugging protocol implementations, and studying how data is represented in memory.

How to Use Base64 to Binary

1

Paste your Base64 string into the input box.

2

Click "Convert to Binary".

3

Copy the binary output.

Common Use Cases

  • Analyzing the binary structure of encoded payloads for protocol debugging.
  • Studying how ASCII characters map to their binary equivalents via Base64.
  • Verifying that a Base64-encoded value contains the expected byte sequence.

Example Input and Output

Decoding "Hello" (Base64: SGVsbG8=) to binary.

Base64
SGVsbG8=
Binary bytes
01001000 01100101 01101100 01101100 01101111

Privacy

All processing runs in your browser. No data is sent to any server.

Frequently Asked Questions

Does this decode the Base64 or convert the characters?

It first decodes the Base64 string to its raw bytes, then shows those bytes in binary. It is not a character-by-character conversion of the Base64 letters themselves.

What does URL-safe Base64 mean?

URL-safe Base64 uses - instead of + and _ instead of /. This tool automatically handles both standard and URL-safe variants.

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