Base64 Encode & Decode
Professional-grade, client-side Base64 converter with full UTF-8 support.
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Monaco Core Engine • Protected Scroller
How to Use Base64 Encoder & Decoder
- 1Choose your mode (Encode or Decode) using the toggle at the top.
- 2Paste your text or Base64 string into the "Input Source" editor.
- 3The tool will instantly process your data as you type.
- 4Click "Copy Result" to save the output to your clipboard.
Pro Tip: Our tool supports full UTF-8 character sets, meaning you can safely encode emojis, international scripts (like Arabic or Mandarin), and special symbols without data loss.
Common Use Cases
API Authentication
Generate "Basic Auth" headers by encoding your username:password string for HTTP requests.
Data URL Embedding
Encode small SVG or binary assets to embed them directly into your CSS or HTML files.
Safe Data Transport
Convert potentially problematic characters into a URL-safe format for reliable transmission.
Web Development Debugging
Instantly decode tokens or payload fragments to inspect their content during development.