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Base64 Encoder & Decoder

Encode, decode, and understand Base64 with confidence. Perfect for developers handling files, APIs, and text-based protocols.

What is Base64?

Base64 encodes binary data into ASCII strings. It's commonly used to safely transmit images, files, or data over text-only mediums such as HTML, email, or JSON APIs.

  • Embedding images: Inline display in HTML/CSS
  • Data URIs: Emails or documents with embedded images
  • Store small files in JSON: PDFs, profile pictures
  • Encoding authentication data: Basic Auth headers
  • Cross-platform transmission: Safe data transport over HTTP/SMTP

Base64 is an encoding mechanism, not encryption.

Base64 Syntax

Base64 uses 64 ASCII characters: A-Z, a-z, 0-9, +, /. Output is padded with = to align properly.

ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/

1 byte → 2 Base64 chars + ==, 2 bytes → 3 chars + =, 3 bytes → 4 chars.

Base64 Encoder

Convert text or binary files into Base64 strings for safe embedding in HTML, CSS, email, or JSON.

  • Embed images and files inline
  • Transmit binary data via text protocols
  • Generate encoded API tokens or credentials
  • Store files inside JSON or configs
Try Base64 Encoder

Base64 Decoder

Decode Base64 strings back to text, files, or media content.

  • Restore embedded images, fonts, or files
  • Read Base64 API responses
  • Debug authentication headers or keys
  • Extract files from JSON, email attachments, or scripts
Try Base64 Decoder
Explore more tools: JSON to XML Converter or JSON Diff Tool.