Base64 Encoder & Decoder
The Base64 Encoder & Decoder lets you instantly convert any text or data to Base64 encoding, or decode a Base64 string back to readable text. Base64 encoding is widely used in APIs, email attachments, data URIs for images, and HTTP authentication headers. The tool runs entirely in your browser with no data sent to any server.
Features
- Text to Base64 encoding
- Base64 to plain text decoding
- URL-safe Base64 variant support
- Clear error messages for invalid Base64 input
- One-click copy to clipboard
- Instant conversion — no delay
- Completely private — no server involved
How to Use
- 1Enter the plain text you want to encode, or the Base64 string you want to decode
- 2Click Encode to convert your text to Base64
- 3Click Decode to convert a Base64 string back to plain text
- 4If the input is invalid, an error message will appear
- 5Click Copy to copy the result to your clipboard
💡 Pro Tips
Use Base64 to embed small images directly in CSS as data URIs (data:image/png;base64,...) to save HTTP requests.
HTTP Basic Auth sends credentials as Base64 of 'username:password' — decode any Authorization header here to verify it.
Never store passwords in Base64 — it's not secure. Use proper hashing algorithms like bcrypt instead.
Common Use Cases
Tool Info
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Frequently Asked Questions
Everything you need to know about the Base64 Encoder & Decoder. Fast answers to common questions about functionality, privacy, and pricing.