Base64 Encoder & Decoder
Encode text to Base64 or decode Base64 strings instantly. Perfect for JWT tokens, API testing, images, and data transmission β completely free and private.
Quick Examples
About the tool
What is Base64 Encoding?
Base64 is a binary-to-text encoding scheme that represents binary data in an ASCII string format using a radix-64 representation. It's commonly used to encode data that needs to be stored and transferred over media designed to handle textual data.
Our free Base64 encoder/decoder tool allows you to convert text to Base64 and decode Base64 strings back to readable text instantly. Whether you're debugging JWT tokens, testing APIs, or working with data transmission, our tool makes the process fast and simple.
The tool runs entirely in your browser using client-side JavaScript, ensuring your data never leaves your device. With full UTF-8 support, you can encode and decode text in any language, including emojis and special characters.
Three simple steps
How to Use Base64 Encoder/Decoder
Enter Text
Type or paste your text or Base64 string
Choose Action
Click Encode or Decode button
Get Result
Copy the converted output instantly
When to use
Common Use Cases
JWT Token Debugging
Decode JWT headers and payloads to inspect claims and understand token structure
eyJhbGciOiJIUzI1NiJ9...API Authentication
Encode credentials for Basic authentication headers in API requests
Authorization: Basic dXNlcjpwYXNzData URI Images
Embed images directly in HTML/CSS using Base64 data URIs
data:image/png;base64,iVBOR...Email Attachments
Understand MIME encoding for email attachments and inline content
Content-Transfer-Encoding: base64FAQ
Frequently Asked Questions
Base64 encoding is used to convert binary data into ASCII text format for safe transmission over text-based protocols. Common uses include JWT tokens, embedding images in HTML/CSS, email attachments (MIME), API authentication headers, and storing binary data in JSON or XML. It's essential for web development when you need to transmit binary data through systems designed for text.
Explore more
Related Tools You Might Find Useful
Ready to encode or decode?
Start converting now β it's free, fast, and completely private. No registration required.