Base64 Encoder/Decoder

How to Use Select either the 'Encode' or 'Decode' tab. Paste or type your text into the input field, then click the button to convert instantly. The result appears below. Use the copy button to save it to your clipboard for immediate use. Who Is This For Developers sending images or files as text through APIs, backend engineers inspecting JWT token contents, IT professionals working with email attachments or binary data protocols. Key Features • Text → Base64 encoding • Base64 → original text decoding • URL-safe Base64 variant support • Full Unicode and Korean character support • Real-time conversion result display Frequently Asked Questions Q: Is Base64 the same as encryption? A: No. Base64 is an encoding format, not encryption. Anyone can decode it, so never use it to protect sensitive data. Q: Can I convert image files to Base64 here? A: This tool is optimized for text. For images, use the dedicated Image → Base64 tool on this site. Q: Why is the Base64 output longer than the original? A: Base64 represents every 3 bytes as 4 characters, increasing size by about 33%. Tips Decode the payload section of a JWT token (the part between the first and second dot) to inspect its claims. HTTP Basic Auth headers also use Base64-encoded 'username:password' strings.