Encode text to Base64 or decode Base64 back to text
A Base64 encoder and decoder is a tool that converts text or binary data into Base64 format and back again. Base64 is a binary-to-text encoding standard commonly used in web development, APIs, authentication headers, email attachments, and data transmission systems. Encoding ensures that binary or special characters can be safely transmitted through text-based formats like JSON, HTML, and HTTP headers. This tool helps you quickly encode plain text into Base64, decode Base64 back into readable text, and test tokens, payloads, or encoded values instantly.
Paste your text or Base64 string into the input field
The tool automatically detects whether you want to encode or decode
Click Encode/Decode to run the conversion instantly
Copy the output result using the copy button
Use the encoded or decoded output in APIs, authentication headers, or applications
Encode Text for APIs: Convert text into Base64 for safe transmission in JSON or HTTP headers
Decode Tokens: Decode Base64 tokens to inspect stored data or debug authentication payloads
Email Attachments: Encode binary data for email systems and MIME payloads
Basic Authentication: Encode username:password for HTTP Basic Auth headers
Store Data Safely: Encode configuration strings for environment variables and config files
Debug Encoding Errors: Quickly check whether a value is valid Base64 and decode it
Encode text to Base64 and decode Base64 back to text
Automatically detects Base64 vs plain text for easy workflow
Fast conversion in real time
Copy output instantly to clipboard
Perfect for debugging API payloads and authentication headers
Runs locally in your browser — no data uploaded