Base64 Encoder / Decoder
Encode text to Base64 or decode Base64 back to text instantly
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What is Base64 Encoding?
Base64 is a binary-to-text encoding scheme that represents binary data in an ASCII string format. It is commonly used to embed images, files, or other binary data within text-based formats such as HTML, CSS, JSON, or XML. Our online Base64 encoder and decoder tool lets you instantly convert plain text to Base64 or decode Base64 strings back to readable text. All operations are performed client-side in your browser, meaning your data never leaves your device. The tool supports Unicode characters (including Chinese, Spanish accents, and emoji) through proper URI encoding.
How to Use
- 1
Enter the text you want to encode, or a Base64 string you want to decode
- 2
Click 'Encode' to convert text to Base64, or 'Decode' to convert Base64 back to text
- 3
Copy the result to your clipboard with the copy button for easy use
FAQ
Why use Base64 encoding?
Base64 encoding is useful when you need to transmit binary data over media that only supports text. Common use cases include embedding images in HTML emails, storing binary data in JSON, and encoding authentication credentials in HTTP headers.
Does Base64 compress data?
No, Base64 is not a compression algorithm. In fact, Base64 encoding increases data size by approximately 33%. It is purely an encoding scheme to make binary data safe for text-based transport.
Does your tool support UTF-8 and Unicode?
Yes. Our Base64 tool uses encodeURIComponent and decodeURIComponent to properly handle Unicode characters including Chinese, Japanese, Arabic, Spanish accents, emoji, and any other UTF-8 text. This ensures your encoded data remains intact across different systems.