Encode and Decode Base64 Online
Convert text to Base64 and vice versa instantly. Free tool perfect for developers, API integration, data transfer and credential encoding. Full UTF-8 support for emojis and special characters.
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What is Base64 and what is it used for?
Base64 is an encoding system that converts binary data (like images, files, or text with special characters) into a readable ASCII text string. It uses an alphabet of 64 characters: uppercase letters (A-Z), lowercase letters (a-z), numbers (0-9) and the symbols + and /.
Most common uses of Base64:
- Image transmission in emails and HTML: Embed images directly in HTML or CSS code using Data URLs (data:image/png;base64,...)
- APIs and authentication: Encode credentials in HTTP headers (Authorization: Basic base64encodedcredentials)
- Binary data in JSON/XML: Include binary information in text-only formats
- Email attachments (MIME): Attach binary files to text-based email protocols
- Database storage: Store binary data in text fields
- File transfer: Safely transmit binary files through text-only protocols
💡 Example transformation:
Original text: "Hello World!" → Base64: "SGVsbG8gV29ybGQh"
Important note: Base64 is NOT an encryption or security method. It's simply a way to represent binary data as text. Anyone can decode Base64 easily, so it should not be used to protect sensitive information without additional encryption.
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