64base-64.com
DecodeEncode
Visualization
Decode VisualizationEncode Visualization
Image
Image to Base64Base64 to Image

About

base-64.com is a free online tool for encoding text to Base64 and decoding Base64 back to plain text. All processing happens entirely in your browser — your data never leaves your device.

Key Features

  • Instant Encoding & Decoding: Convert text to Base64 or Base64 back to text in real time
  • URL-Safe Mode: Optional URL-safe encoding using - and _ instead of + and /
  • UTF-8 Support: Correctly handles all Unicode characters, including emojis and international text
  • Client-Side Processing: All operations run locally in your browser for maximum privacy
  • Visual Breakdown: Interactive visualization shows exactly how each byte maps to Base64 characters
  • Image Base64 Conversion: Batch encode images to Data URIs (HTML / CSS / raw output) and decode Base64 back to downloadable images
  • Step-by-step Visualization: Inspect every bit transformation from text to Base64, with an optional binary breakdown view

Use Cases

  • Data URLs: Embed small images directly in HTML or CSS without separate HTTP requests
  • API Development: Encode binary data for JSON payloads and HTTP headers
  • Email Attachments: Understand how MIME encodes binary files as Base64 text
  • Configuration Files: Store binary secrets and certificates in text-based configs
  • JWT Tokens: Decode and inspect the payload section of JSON Web Tokens

Feedback

If you have any questions or suggestions about our tool, please feel free to contact us.