Base64 Encoder / Decoder: Free Online Text & URL Safe Converter
Convert text to Base64 or decode Base64 strings back to text. Supports Unicode and special characters.
The Essential Online Base64 Encoder and Decoder
Our Base64 Encoder / Decoder is an essential online Base64 converter for securely handling text data for web and programming applications. Base64 is a crucial encoding scheme that converts binary data (like text) into printable ASCII characters. This allows you to safely convert text to Base64 for use in URLs, JSON, and XML. It also allows you to decode Base64 strings back into their original, readable form.
The URL Safe option ensures the encoded string is safe for use in web addresses, replacing special URL characters with benign alternatives. This utility is completely client-side, meaning your data is never uploaded to our servers, guaranteeing complete privacy and security.
Quick Guide: Base64 Encode and Decode
- Select Mode: Choose Encode to turn text into Base64, or Decode to turn Base64 into text.
- Input: Type or paste your content into the left box or Upload a .txt file.
- Options: Toggle the URL Safe option if the Base64 string will be part of a URL.
- Convert: Click "Convert" or use the Live Mode. The result appears instantly on the right.
Frequently Asked Questions
Base64 is an encoding scheme that converts binary data (like text or small images) into a sequence of 64 printable ASCII characters. It is used to safely transmit data across media that are only designed to handle text, such as embedding images in CSS or passing data in URL parameters.
The URL Safe option is vital when the Base64 string is intended for use in a URL. It replaces the standard Base64 characters '+' and '/' (which have special meaning in URLs and must be percent-encoded) with safe equivalents '-' and '_', ensuring the parameter remains valid and is not corrupted during transmission.
Yes, absolutely. This utility is a professional, client-side tool. The entire encoding and decoding process is performed locally within your web browser using JavaScript. Your text is never uploaded to our servers, guaranteeing complete privacy and security.