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Base64 Encoder Decoder Online

Free online tool to encode or decode base64 data. Fast, private, and easy to use with no login required. All processing happens in your browser.

base64
encoder
decoder

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About Base64 Encoder & Decoder

This free online Base64 encoder and decoder tool allows you to encode text or files to Base64 format and decode Base64 strings back to their original form. Perfect for web development, API integration, and data transmission.

Key Features

  • Text encoding to Base64 format with Unicode support
  • Text decoding from Base64 back to readable text
  • File encoding for any file type (images, documents, etc.)
  • File decoding with downloadable results
  • Real-time Base64 format validation
  • Auto-validation as you type for instant feedback
  • Copy to clipboard or download results as files

Use Cases

  • Email attachment encoding for transmission
  • Data URL creation for embedding images in HTML/CSS
  • API integration for sending binary data through JSON
  • Web development for inline image display
  • Data storage in text-based databases
  • Configuration files with embedded binary data

Supported Formats

Plain Text (UTF-8)
Base64 Encoded Text
Images (PNG, JPG, GIF, SVG)
Documents (PDF, DOC, TXT)
Binary Files
Data URLs

Related Keywords

base64 encoder
base64 decoder
base64 converter
encode base64
decode base64
base64 online
base64 tool
binary to text
data url generator
file encoder

Important Note

Base64 encoding increases the size of data by approximately 33%. It's designed for compatibility, not compression. For large files, consider using compression before Base64 encoding.

Privacy & Security

All processing happens locally in your browser. Your data never leaves your computer, ensuring complete privacy and security.

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