Encode text to Base64 or decode Base64 strings back to readable text. All processing happens in your browser.
Base64 is a binary-to-text encoding scheme that represents binary data in an ASCII string format using a set of 64 characters (A-Z, a-z, 0-9, +, /). It is commonly used for transmitting data over media designed to handle text, such as embedding images directly in HTML or CSS files, storing binary data in JSON payloads, and encoding credentials in HTTP Basic Authentication headers. Base64 encoding increases data size by approximately 33% but ensures safe transmission through text-based protocols.
Enter any text in the input field and click "Encode" to convert it to a Base64 string. To decode, paste a Base64-encoded string and click "Decode" to see the original text. The tool handles Unicode characters correctly using UTF-8 encoding internally. All encoding and decoding happens directly in your browser for maximum privacy.
This free Base64 encoder is fast, reliable, and completely private. No data ever leaves your device, making it safe for sensitive content like API keys or authentication tokens. Perfect for developers who need quick encoding and decoding during web development, API testing, or working with data URIs. Works offline, requires no registration, and delivers instant results.