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BASE64 Encoder/Decoder

Encode text to BASE64 or decode BASE64 to text with this simple online tool.

Input

Output

What is BASE64?

BASE64 is an encoding scheme that represents binary data in an ASCII string format. It's commonly used to encode binary data, such as images or files, into text that can be safely transmitted over text-based protocols like email or HTTP. BASE64 uses a set of 64 characters (A-Z, a-z, 0-9, +, /) to represent data, with '=' used for padding.

Key Features

  • Encode text to BASE64 format
  • Decode BASE64 back to original text
  • URL safe encoding support
  • Client-side processing for security
  • One-click copy and real-time conversion

How to Use

  1. 1Select either Encode or Decode tab
  2. 2Enter or paste your text or BASE64 data in the input field
  3. 3Click Convert button to see the result and copy it

Use Cases

BASE64 Encoder/Decoder is useful in the following situations:

  • Email attachment encoding (MIME)
  • Storing binary data in JSON/XML
  • Embedding images directly in HTML/CSS (Data URI)
  • Data transmission in API communications
  • Authentication token and password encoding

Technical Details

BASE64 uses 64 printable characters to represent binary data.

Encoding Method

Divides 3 bytes (24 bits) of binary data into 4 groups of 6 bits, and maps each group to one of 64 characters (A-Z, a-z, 0-9, +, /).

Decoding Method

Converts BASE64 characters to their corresponding 6-bit values, then concatenates them to restore the original binary data. Padding characters (=) are ignored.

Frequently Asked Questions

What is Base64 encoding?

Base64 is a binary-to-text encoding scheme that represents binary data in ASCII string format. It's commonly used to encode data for transmission over text-based protocols.

When should I use Base64 encoding?

Use Base64 when you need to transmit binary data over text-only channels, embed images in HTML/CSS, store binary data in JSON/XML, or include attachments in email.

Is Base64 encoding secure?

No, Base64 is not encryption. It's simply a data encoding format that can be easily decoded. Never use Base64 alone for securing sensitive information.

Why does Base64 increase data size?

Base64 encoding increases data size by approximately 33% because it converts every 3 bytes of binary data into 4 ASCII characters.

Can I encode files with Base64?

Yes, you can encode any type of file including images, PDFs, and documents. Our tool supports drag-and-drop file upload for easy encoding.