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Format Conversion
Encode and decode Base64 strings
Execution
Fill in the form, run the tool, and review the result in one place.
Samples
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Tool usage guide
The Base64 Encoder/Decoder is a lightweight utility designed to quickly convert plain text into Base64 format or revert Base64 strings back into readable text.
Background
A developer needs to include basic authentication credentials in an HTTP header.
Problem
The username and password must be Base64 encoded to meet the Basic Auth standard.
How to use
Enter 'username:password' into the input field and select 'Encode'.
Outcome
The tool generates the Base64 string required for the 'Authorization' header.
Background
An analyst is reviewing network traffic and encounters a suspicious Base64-encoded string.
Problem
The string is unreadable and needs to be decoded to identify the underlying message.
How to use
Paste the encoded string into the input field and select 'Decode'.
Outcome
The tool reveals the original plain text, allowing the analyst to inspect the content.
Base64 is a binary-to-text encoding scheme that represents binary data in an ASCII string format.
No, this tool performs all encoding and decoding operations locally in your browser for your privacy.
This tool is designed for text-based input. For images, you must first convert the file to a Base64 string before pasting it here.
This usually happens if the input string is not a valid Base64 sequence or was encoded using a different character set.
The tool can handle large strings, but performance may vary depending on your browser's memory capacity.