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Instantly encode text into Base64 format or decode a Base64 string back to human-readable text.
Base64 is a group of binary-to-text encoding schemes that represent binary data in an ASCII string format. In simpler terms, it translates any text, image, or file into a string of standard letters and numbers (A-Z, a-z, 0-9, +, and /).
It is called "Base64" because it uses exactly 64 characters to represent data. The primary purpose of Base64 is to ensure that data remains intact and unchanged when transmitted over networks or protocols that are traditionally designed to handle only plain text (like HTTP headers, XML, JSON, or Email/SMTP).
⚠️ Security Warning
Base64 is NOT an encryption method. It provides zero security. Anyone with access to a Base64 string can decode it instantly. Never use Base64 to "hide" or secure passwords, API keys, or sensitive personal data. Use proper encryption algorithms (like AES) or hashing (like bcrypt) for security.
Why does my Base64 string end with '='?
The '=' symbol is used as padding in Base64. Because Base64 encodes 3 bytes of data into 4 characters, if your original data isn't a multiple of 3 bytes, padding is added to make the final output correctly sized.
Does this tool support UTF-8 characters?
Yes! Unlike standard basic encoders, our tool properly handles UTF-8 characters, meaning you can safely encode emojis (🚀) and special foreign language characters without breaking the output.
Is it safe to use this tool for sensitive strings?
Yes, because the conversion happens 100% locally in your browser using JavaScript's native btoa() and atob() functions. We do not transmit or log your strings.