Base64 Encoder/Decoder

Encode to Base64

Decode from Base64

About Base64

Base64 is a binary-to-text encoding scheme that represents binary data using 64 ASCII characters (A-Z, a-z, 0-9, +, /).

  • πŸ“§ Email Attachments
  • 🌐 Web Data URLs
  • πŸ” Authentication Tokens
  • πŸ“„ XML/JSON Data
  • πŸ–ΌοΈ Image Embedding
Character Set
A-Z Values 0-25
a-z Values 26-51
0-9 Values 52-61
+ Value 62
/ Value 63
= Padding
Quick Facts
  • πŸ“Š Size Increase: ~33% larger
  • πŸ”„ Reversible: Perfect encoding/decoding
  • πŸ“ Text Safe: Only printable ASCII
  • 🌐 URL Safe: Optional variant available

Professional Base64 Encoding and Decoding Tool

Our Base64 encoder/decoder provides reliable conversion between binary data and Base64 text representation. Perfect for web development, API integration, data transmission, and handling binary content in text-based systems.

What is Base64 Encoding?

Base64 is a method of encoding binary data using only 64 ASCII characters. It's widely used in web development, email systems, and data storage to safely transmit or store binary data in text-based formats.

Common Base64 Use Cases

  • Embedding images directly in HTML/CSS using data URLs
  • Encoding binary attachments in email messages
  • Storing binary data in JSON or XML documents
  • Creating authentication tokens and API keys
  • Transmitting files through text-based protocols
  • Encoding data for safe URL transmission

Base64 vs URL-Safe Base64

Standard Base64 uses characters that can cause issues in URLs (+, /). URL-safe Base64 replaces these with URL-friendly alternatives (-, _) for safe use in web applications and APIs.

Developer Benefits

  • Instant encoding/decoding with real-time results
  • Support for both standard and URL-safe Base64 variants
  • Error detection for invalid Base64 input
  • Copy-to-clipboard functionality for quick integration
  • No server uploads - all processing happens locally

Base64 Questions

It turns binary data into text using 64 safe ASCII characters. Handy when you need to stuff an image into JSON, send binary through a text-only channel, or create data URIs.

Not even slightly. It's encoding, not encryption β€” anyone can decode it instantly. If you see 'base64' and think 'security', think again. It's just a transport format.

Embedding small images in CSS/HTML (data URIs), passing binary data through JSON APIs, email attachments (under the hood), or debugging that weird-looking string someone pasted in Slack.

About 33% bigger. Every 3 bytes become 4 characters. That's the cost of making binary data safe for text channels.