Privacy Secured: This utility runs 100% inside your browser. No files, logs, or values are uploaded to any server. Your information stays safe on your device.
About Base64 Encoder
The Base64 Encoder is a secure utility designed to translate text or binary files into Base64 format. Base64 encoding represents binary data in an ASCII string format, which is useful for embedding images in HTML/CSS, transmitting binary data over text-based protocols (like email), or passing data in API parameters without character encoding issues.
How it Works
Select either Text or File mode. In Text mode, type your string and click Encode. In File mode, drag and drop any file (like an image or PDF). The tool encodes the input into a Base64 string and displays it in an output box, ready to copy.
Key Features
- Dual Modes: Encode text strings or binary files.
- HTML/CSS Ready: Ideal for creating inline data URI images.
- Secure & Local: All encoding is processed in-memory in your browser.
- Copy Button: One-click copying to your clipboard.
Technical Details
For text encoding, the script uses the browser's btoa() function, handles UTF-8 characters using unescape(encodeURIComponent(str)), and outputs base64. For file encoding, it reads files using the FileReader readAsDataURL() API, which outputs a standard Data URL containing the base64 string.