Base64 Encoder/Decoder

Encode text or files to Base64 or decode Base64 back to original format

Input

How to Use

Text Encoding

  • Select "Encode" mode
  • Enter text in the input area
  • Click "Encode" button
  • Copy the Base64 result

Text Decoding

  • Select "Decode" mode
  • Enter Base64 string
  • Click "Decode" button
  • View decoded text

Complete Base64 Encoding Guide

1. Understanding Base64 Encoding

Base64 is a binary-to-text encoding scheme that represents binary data in ASCII string format. It's commonly used for:

  • Email attachments - Encoding binary files for email transmission
  • Web development - Embedding images directly in HTML/CSS
  • Data URLs - Including small images in web pages
  • API communication - Safe transmission of binary data

2. How to Use This Tool

Simple steps to encode or decode data:

  • Choose mode - Select Encode or Decode
  • Enter text - Input your text in the text area
  • Process - Click Encode/Decode button
  • Copy result - Use the copy button for easy access

3. Encoding vs Decoding

Encoding: Converts regular text to Base64 format (e.g., "Hello" → "SGVsbG8=").
Decoding: Converts Base64 back to original text (e.g., "SGVsbG8=" → "Hello").

4. Common Use Cases

  • Web APIs - Encoding authentication credentials
  • CSS Images - Creating data URLs for small images
  • Configuration - Storing binary data in JSON/XML
  • Testing - Debugging encoded data in applications

Perfect for Developers & Designers

Our Base64 encoder/decoder is designed specifically for web developers, software engineers, and digital professionals. Whether you're working on web applications, APIs, or digital projects, this tool provides everything you need to handle Base64 encoding efficiently.

Practical Applications:

  • Web Development: Embed small images directly in HTML/CSS using data URLs
  • API Integration: Handle authentication tokens and binary data in REST APIs
  • Database Storage: Store binary files as text in databases
  • Email Systems: Encode attachments for MIME email transmission
  • Configuration Files: Include binary resources in JSON/XML configurations

Base64 Format Explained

Character Set

Uses 64 characters: A-Z, a-z, 0-9, plus "+" and "/" symbols, with "=" for padding. Safe for transmission over text-based protocols.

Size Increase

Base64 encoding increases data size by approximately 33%. Every 3 bytes of binary data becomes 4 bytes of Base64 text.

URL Safety

Standard Base64 uses "+" and "/" which aren't URL-safe. For URLs, use URL-safe variants with "-" and "_" instead.

Security & Privacy Guarantee

All Base64 encoding and decoding operations are performed entirely in your browser using client-side JavaScript. No data is sent to our servers, ensuring complete privacy and security for your sensitive information.

  • ✅ Client-side processing - no server transmission
  • ✅ No data storage or logging
  • ✅ Instant results without network delays
  • ✅ Safe for sensitive data processing
  • ✅ Works offline once loaded

Encoding Examples

Simple Text

Original: Hello World
Base64: SGVsbG8gV29ybGQ=

JSON Data

Original: {"name":"John","age":30}
Base64: eyJuYW1lIjoiSm9obiIsImFnZSI6MzB9

HTML Content

Original: <h1>Title</h1>
Base64: PGgxPlRpdGxlPC9oMT4=