Base64 Encoder & Decoder
Encode string text or uploaded files into Base64 format, or decode Base64 strings back to plain text instantly with UTF-8 support.
Plain Text Input
Drag & drop a file here, or click to browse
Base64 Result
What is Base64 Encoding and How Does it Work?
Base64 is a binary-to-text encoding scheme that represents binary data using an ASCII string format. It is widely used in web development, email transmission (MIME), data URI images, and web APIs to transport data safely without character corruption over network protocols.
Key Features
- UTF-8 & Unicode Support: Correctly encodes non-ASCII characters, emojis, and international alphabets without encoding errors.
- URL-Safe Encoding: Option to replace standard
+and/characters with-and_for query string parameter safety. - File to Base64 Conversion: Convert local files, images, PDFs, or audio into Base64 Data URLs for inline HTML embedding.
- 100% Client-Side Privacy: Your text and uploaded files are converted locally inside your web browser engine.
Is Base64 considered encryption?
No. Base64 is an encoding format designed for data transmission, not data security or privacy. Anyone can decode a Base64 string back into its original form.
Why does Base64 increase file size?
Base64 converts every 3 bytes of binary data into 4 ASCII characters, resulting in approximately a 33% increase in data payload size.