A free, open-source online Base64 encoding and decoding tool.
- Encode text to Base64
- Decode Base64 to text
- UTF-8 support - handles all Unicode characters
- Client-side processing - your data never leaves your browser
- No ads, no signup - just a clean, fast tool
- Dark mode - easy on the eyes
- Keyboard shortcuts - Ctrl/Cmd + Enter to process
- Copy to clipboard - one-click copy
- Encoding data for email attachments
- Creating Data URLs for images
- Basic Authentication headers
- JWT token inspection
- API development
- Main Tool - Encode/decode Base64
- Alternatives Comparison - Compare with other tools
- Vanilla JavaScript (no frameworks)
- HTML5 + CSS3
- Cloudflare Pages hosting
| Feature | This Tool | Others |
|---|---|---|
| Client-side processing | ✅ | ❌ (most send data to server) |
| No ads | ✅ | ❌ |
| Dark mode | ✅ | ❌ |
| Open source | ✅ | ❌ |
| Free forever | ✅ | ✅ |
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MIT
Built by Auto Company