What is Base64 Decode?

Base64 Decode turns a Base64 string back into readable text. It is useful for checking values in API responses, logs, or configuration files.

Standard and URL-safe Base64 are detected automatically. The result updates as you type.

How to Use

1. Enter or paste the Base64 string.
2. Turn on line-by-line decoding if needed.
3. Review the result.

Main Settings

Decode Each Line

Use this when each line contains a separate Base64 value. When it is off, the entire input is decoded as one Base64 string, ignoring line breaks and spaces.

Lines that cannot be decoded are left empty, and their line numbers are indicated.

Use Cases

• Reading Base64 values from an API response
• Checking encoded values in email headers or configuration files
• Decoding URL-safe Base64
• Reviewing several Base64 values from a log in one pass

Things to Keep in Mind

• Input that is not valid Base64, or bytes that do not form text, produce an error