Encode text to Base64 or decode Base64 back to text. All processing happens in your browser—no data leaves your device.
Base64 is an encoding scheme that converts binary data into ASCII text. It uses 64 characters (A–Z, a–z, 0–9, plus signs, and slashes) to represent any data. Base64 is widely used for embedding images in HTML, storing data in URLs, and transmitting binary content over text-only protocols.
Encoding converts plain text or binary data into Base64. Decoding reverses the process to recover the original content. Invalid Base64 input will produce an error when decoding—ensure you paste complete, valid Base64 strings.
Base64 is not encryption. It does not hide or protect data—anyone with the string can decode it. Never use Base64 for sensitive information. Use proper encryption for passwords and secrets.
Our development team builds secure applications with proper handling of encoding, encryption, and data serialization. Get in touch for custom solutions.
No. Base64 is a reversible encoding scheme — anyone with the encoded string can decode it instantly. It provides zero security. For protecting sensitive data, use proper encryption algorithms like AES-256 and always transmit secrets over HTTPS. Use our URL encoder/decoder when you need to safely include special characters in URLs instead.
Base64 represents every 3 bytes of binary data as 4 ASCII characters. This 4:3 ratio means the encoded output is always approximately 33% larger than the original. Padding characters (=) are appended when the input length is not a multiple of three.
Yes. The tool encodes Unicode text using UTF-8 before applying Base64, so characters like emojis, accented letters, and CJK characters are preserved correctly through encode-decode round trips. For building production APIs that handle encoding robustly, our web development team implements proper serialization, validation, and error handling.