Free Online Base64 Encoder & Decoder

Encode text to Base64 or decode Base64 to text instantly. Supports Unicode, works offline.

Text Input
Enter text to encode
Base64 Output
0 characters

How the Base64 Encoder Works

The SimpleTaskTools Base64 Encoder/Decoder is a free online tool for converting text to Base64 and vice versa. Base64 encoding is commonly used for encoding binary data in text formats, embedding images in CSS/HTML, and transmitting data through text-only channels.

Encode Text to Base64

Convert any text, including Unicode characters and special symbols, into Base64 format. This is useful for embedding data in URLs, storing binary data in JSON, or preparing text for transmission through systems that only support ASCII.

Decode Base64 to Text

Convert Base64-encoded strings back to their original text form. This is helpful for reading encoded data from APIs, decoding embedded content, or debugging data transmission issues.

Unicode Support

Our encoder fully supports Unicode characters, including emojis and characters from all languages. The tool handles UTF-8 encoding properly to ensure your text is accurately converted.

Privacy First

All encoding and decoding happens locally in your browser. Your data is never sent to any server, making this tool safe for sensitive information like API keys, tokens, and personal data.

Frequently Asked Questions

Base64 is used to encode binary data into ASCII text format. Common uses include embedding images in HTML/CSS, encoding email attachments, storing binary data in JSON, and transmitting data through text-only protocols. It is essential for web development and data transmission.

No, Base64 is NOT encryption. It is simply an encoding scheme that converts data to a different format. Anyone can decode Base64 strings. If you need to protect sensitive data, you should use actual encryption methods before Base64 encoding.

Base64 encoding increases data size by approximately 33% because it represents 3 bytes of binary data using 4 ASCII characters. This trade-off is acceptable when you need to transmit binary data through text-only channels.

No, all Base64 encoding and decoding happens 100% locally in your browser using JavaScript. Your data never leaves your device, making this tool safe for sensitive information like API keys and tokens.

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