Base64 Encoder/Decoder

Encode text to Base64 or decode Base64 back to plain text. Supports full UTF-8 with real-time conversion.

Mode

Text Input

Base64 Output

Quick Tips

  • •Base64 encoding converts binary data into ASCII text using 64 printable characters
  • •Encoded output is roughly 33% larger than the original input
  • •Base64 is commonly used for embedding images in CSS/HTML and data URIs
  • •This tool supports full UTF-8 text, including emojis and special characters
  • •Base64 is an encoding scheme, not encryption — it provides no security

Frequently Asked Questions

What is Base64 encoding?

Base64 is a binary-to-text encoding scheme that represents binary data in an ASCII string format, commonly used in web development.

Can I encode files to Base64?

Yes, you can encode text strings and generate data URIs for embedding images and files directly in HTML or CSS.

Is Base64 encoding the same as encryption?

No. Base64 is an encoding format, not encryption. It does not provide any security — anyone can decode Base64 strings.

Why does Base64 encoding increase the size of data?

Base64 represents every 3 bytes of binary data as 4 ASCII characters, resulting in roughly a 33% size increase. This overhead is the trade-off for being able to safely transmit binary data through text-only channels like email, JSON, or HTML.

Does this Base64 tool support UTF-8 and special characters?

Yes, this tool fully supports UTF-8 encoding, including multi-byte characters like emojis, accented letters, and non-Latin scripts. The input text is first encoded to UTF-8 bytes before applying the Base64 transformation, ensuring accurate round-trip encoding and decoding.