BASE64 Tool
Encode or decode text and files to Base64 instantly. Supports Image Data URI and Base64URL standards.
Integrity Verified
Data processed securely. Full compliance with RFC 4648 detected.
Base64 Converter Use Cases
Frequently Asked Questions
Q. Is my data secure?
Yes, encoding and decoding are performed entirely within your browser. No data is sent to any server.
Q. What is "URL Safe" Base64?
It replaces characters like + and / with - and _ to prevent issues when used in URLs or filenames.
Q. Can I encode images?
Absolutely. You can drag and drop image files to generate Data URIs or raw Base64 strings.
Q. What is the padding (=) for?
Padding ensures the encoded string length is a multiple of 4, though some modern decoders can handle its absence.
Q. Is Base64 a form of encryption?
No, it is an encoding format for data representation, not a security measure. It can be easily reversed.
Base64 vs Base64URL
| Feature | Standard Base64 | Base64URL |
|---|---|---|
| 62nd Character | + (Plus) | - (Minus) |
| 63rd Character | / (Slash) | _ (Underscore) |
| Padding (=) | Required | Optional/None |
| URL Safety | Requires Escaping | Safe for URLs |
| Standard | RFC 4648 (Section 4) | RFC 4648 (Section 5) |
⚠️ Base64URL is widely used in JWT and OAuth tokens to avoid URL encoding issues.
Data URI Size Limits
2 MB
32 MB
10 MB
1 MB
100 KB
" Base64 encoding increases file size by approximately 33%. "
Key Features
- Bidirectional Real-time Encoding & Decoding
- One-click URL-Safe Base64 Toggle
- Support for Large Binary Files & Data URIs
- 100% Local Privacy (No Server Uploads)
Professional Base64 tools for developers. Encode text to base64, decode base64 strings, and generate URL-safe strings instantly.