Base64 Encoder and Decoder

Free online Base64 encoder and decoder for text and image Data URI conversion. Supports UTF-8, fast conversion, and local browser processing.

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How to use

Base64 encoding:Enter text, then click Encode or press Ctrl+Enter to encode it as Base64.
Base64 decoding:Enter a Base64 string, then click Decode to convert it back to text.
Swap content:Use Swap to exchange the input and output content quickly.
Image to Base64:Choose an image file to generate a Base64 Data URI automatically.
Copy result:Use Copy result to copy the output to your clipboard.

FAQ

What is Base64 encoding?: Base64 represents binary data with printable characters and is commonly used for transport, embedding, and API payloads.
Which characters are supported?: This tool supports UTF-8 text, including English, Chinese, Japanese, numbers, symbols, and other Unicode characters.
When should I use Base64?: Base64 is useful for email transfer, data storage, API payloads, and embedding images in HTML or CSS.