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Base64 Encoder and Decoder

Encode text to Base64 or decode Base64 back to text instantly, with full Unicode support. Free, private, and runs in your browser.

What Is Base64?

Base64 encodes binary or text data into a safe set of letters, numbers, and a few symbols. It is widely used to embed images in HTML or CSS, send attachments in email, and carry data through JSON APIs where raw bytes are not allowed.

Encode or Decode?

Encoding turns readable text into a Base64 string, about 33% longer than the original. Decoding turns a Base64 string back into readable text. This tool handles both with Unicode support, so emoji and accented letters work correctly.

A Note on Security

Base64 is not encryption. Anyone can decode it, so never use it to hide sensitive information. For protecting data, use a real hash or encryption approach.

Frequently Asked Questions

Is Base64 the same as encryption?
No. Base64 is just a different text format. It is easily reversible, so treat Base64 data as public, not secret.
Why is Base64 longer than the original?
Each group of three bytes becomes four text characters, which adds roughly 33% overhead.
Can I encode images with this tool?
What is Base64 encoding used for?
Base64 encodes binary data as text, so it can be safely embedded in emails, URLs, and JSON payloads. Use the decoder to convert it back.
Yes, for small images. Paste an existing Base64 data string to decode it, or use the encode mode for data that is already text.
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