FAQ — Text-to-Base64 (T64)
Short answers to common questions. Click a question to reveal a concise answer.
No. All encoding and decoding happen entirely in your browser using JavaScript. Your text never leaves your device and is not sent to any server. This ensures complete privacy and security for your data.
As you type or paste text, the tool automatically processes it in real-time with a short delay (350ms). In Encode mode, plain text is converted to Base64. In Decode mode, Base64 is converted back to plain text. No button clicks needed!
The input field accepts up to 10,000 characters. You can see your current character count displayed in real-time above the input box. For larger text files, consider processing them in chunks or using a command-line tool.
Click the mode dropdown button (shows "Encode" or "Decode") above the input field. Select your desired mode from the menu. The tool will instantly reprocess your text according to the new mode, and the placeholder text will update accordingly.
No. Base64 is an encoding, not encryption. Anyone can easily decode it back to the original text. Never use Base64 to protect passwords, API keys, or sensitive information. Use proper encryption (AES, RSA) for security purposes.
Yes! The tool uses UTF-8 encoding with proper Unicode handling. Emojis (😊), accented letters (café), Chinese characters (你好), and other international text are all encoded correctly using URL-safe character conversion.
Use the "Copy to Clipboard" button to instantly copy the result, or click "Download .txt" to save it as a text file. The downloaded file is automatically named with a timestamp (e.g., encode_1234567890.txt) for easy organization.
Common uses include: embedding small images in CSS/HTML (data URIs), encoding JSON in URLs, email attachments (MIME), API authentication tokens, storing binary data in JSON/XML, and transmitting data over text-only protocols. Best for small to medium payloads.
Base64 converts binary data (8 bits per byte) into text using only 64 printable ASCII characters (6 bits per character). This mathematical conversion results in approximately 33% size increase. A 100-byte file becomes ~133 bytes when Base64-encoded.
This tool is designed for text-only encoding. For encoding images, PDFs, or other binary files, you'll need a dedicated file-to-Base64 converter that can read file contents directly. This prevents binary data corruption that can occur with text-based inputs.
This error means the input isn't valid Base64. Check for: extra spaces or line breaks, invalid characters (Base64 only uses A-Z, a-z, 0-9, +, /, and = for padding), or incomplete/truncated strings. Remove any formatting and try again.