Base64 Encoder

Convert any text to Base64-encoded format instantly — supports UTF-8, emojis, and special characters.

Text → Base64
Plain Text Input
Base64 Output

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What is the Base64 Encoder?

Base64 encoding converts arbitrary binary data into a string of 64 printable ASCII characters. The algorithm processes input in groups of 3 bytes (24 bits), splitting them into four 6-bit segments, each mapped to a character from the Base64 alphabet (A-Z, a-z, 0-9, +, /). Padding with = characters ensures the output length is always a multiple of 4. This encoding is essential for embedding binary data in text-only formats like JSON, XML, email (MIME), and URL parameters.

How to use the Base64 Encoder?

  1. Type or paste any plain text into the input area.
  2. Click 'Encode' to instantly convert it to a Base64-encoded string.
  3. The encoder supports full UTF-8 — emojis, accented characters, and multi-byte text are handled correctly.
  4. Click 'Copy' to copy the Base64 output to your clipboard.
  5. Use the encoded string in API payloads, email headers, or data URIs.

Frequently Asked Questions

What is Base64 encoding used for?

Base64 encoding converts binary or text data into ASCII characters, making it safe to transmit through text-only channels like email (MIME), JSON payloads, URL parameters, and HTML data attributes.

Does Base64 encoding encrypt data?

No. Base64 is an encoding scheme, not encryption. Anyone can decode a Base64 string back to the original data. Do not use Base64 as a security measure — use actual encryption (AES, RSA) for sensitive data.

How much larger does Base64 make my data?

Base64 increases data size by approximately 33%. Every 3 bytes of input become 4 Base64 characters. For example, a 100-byte input produces about 133 characters of Base64 output.

Does this handle UTF-8 characters?

Yes. The encoder uses TextEncoder to convert UTF-8 text (including emojis and accented characters) to bytes before encoding, ensuring correct Base64 output for any Unicode text.