Base64 Encode and Decode

Encode and decode text to base64 online. Base64 encoding is used to encode binary data in text format.

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Frequently Asked Questions

Find the answers to the most frequently asked questions below. If your question isn't here, or you need more info, or have feedback, please reach out.

What is Base64 encoding?

Base64 encoding is a method used to convert binary data into a text string, making it suitable for transmission via text-based protocols. It's commonly used in email encoding and storing complex data in XML or JSON.

How does Base64 encoding work?

Base64 encoding works by dividing data into chunks of 6 bits and then mapping each chunk to a character from a predefined 64-character set. This includes uppercase and lowercase letters, digits, '+', and '/'. Padding with '=' ensures the final output's length is a multiple of 4.

When should I use Base64 encoding?

Use Base64 encoding when you need to include binary data within text-based formats like JSON, XML, or HTML. It's particularly useful in email attachments, embedding images in HTML/CSS, and working with data APIs.

Can I decode Base64 back to its original form?

Yes, Base64 decoding reverses the encoding process, converting the Base64 string back to the original binary data. This is useful for data retrieval in formats or protocols that initially required encoding.

Is Base64 encryption secure?

No, Base64 is not a method of encryption. It simply encodes data without providing privacy or security. For secure data transmission, use encryption methods like AES or RSA.

What is the length impact of Base64 encoding?

Base64 encoding increases data size by +33%. For every 3 bytes of binary data, Base64 outputs 4 characters. Take that in account if network bandwidth or storage is a concern.

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