What is Base64 Encoding?
Base64 is a widely used encoding scheme that converts binary data or standard text into an ASCII string format. It is fundamentally used to prevent data corruption when transmitting information across networks that are designed to handle only text, such as email protocols (SMTP) or HTML/CSS files. This free online encoder and decoder allows you to instantly convert normal text into Base64 strings, or safely decode Base64 strings back into readable text.
How to encode and decode Base64 online
Using our tool is incredibly simple. First, select your desired mode using the toggle—choose 'Encode to Base64' if you want to convert standard text, or 'Decode to Text' if you have a Base64 string you need to read. Next, paste your input into the large text area. The tool will instantly process your data in real-time. Finally, click the 'Copy Result' button to save the output to your clipboard. Since everything runs locally in your web browser, the conversion is lightning fast and 100% private.
Full UTF-8 Support and Offline Privacy
A common issue with standard Base64 decoders is that they break when encountering emojis, non-English characters, or special symbols. Our tool includes full UTF-8 support, meaning it safely handles complex strings without data loss or corruption. Furthermore, unlike server-side utilities that may log your data, our Base64 encoder executes entirely on your device using native browser APIs. This guarantees that your sensitive information, tokens, or API keys are never transmitted over the internet.