Build. Convert. Optimize.
Free online Base64 encoder and decoder. Convert text, images, and files to Base64 format and vice versa. Fast, secure, and easy to use.
What is Base64?
Learn about Base64 encoding and how it works
Definition
Base64 is a binary-to-text encoding scheme that represents binary data in ASCII string format. It uses 64 printable characters (A-Z, a-z, 0-9, +, /) to represent data, hence the name "Base64".
How It Works
Base64 takes binary data and groups it into 3-byte (24-bit) chunks, then divides each chunk into four 6-bit groups. Each 6-bit group is mapped to one of 64 characters. If the data doesn't divide evenly by 3, padding characters "=" are added.
Common Uses
- ✓Embedding images in HTML/CSS
- ✓Transferring files via JSON APIs
- ✓Email attachments (MIME encoding)
- ✓HTTP Basic Authentication
- ✓Data URLs and inline resources
Safe Transfer
Safely transmit binary data in text-only systems
Universal Support
Supported by all modern programming languages and platforms
Simple & Fast
Encoding and decoding algorithms are simple and efficient
Core Features
Text Encoding
Encode and decode text strings to/from Base64 format with ease.
Image Conversion
Convert images to Base64 strings and vice versa. Support for multiple formats. Share converted images directly to social platforms.
PDF Processing
Convert PDF files to Base64 encoding and decode Base64 back to PDF.
Fast Processing
Lightning-fast conversion with optimized algorithms for best performance.
Secure & Private
All processing happens in your browser. No data is sent to our servers.
Multi-language
Available in multiple languages with full internationalization support.