CcConvertCase

Base64 Encode & Decode

Encode plain text to Base64 or decode a Base64 string back to text. All processing happens in your browser — nothing is sent to a server.

Characters: 0 | Lines: 0

EXAMPLE

Input:   Hello, World!

Encoded: SGVsbG8sIFdvcmxkIQ==

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About Base64

Base64 encodes binary data using 64 printable ASCII characters (A–Z, a–z, 0–9, +, /). The output is roughly 33% larger than the input.

Common uses

  • Embedding images in HTML/CSS: src="data:image/png;base64,..."
  • Email attachments (MIME encoding)
  • Storing binary data in JSON APIs
  • HTTP Basic Authentication headers
  • JWT (JSON Web Token) payload encoding

Privacy note

This tool runs entirely in your browser. No data leaves your device.