Base64 Encoder & DecoderEncode and Decode Instantly
Encode text to Base64 or decode Base64 strings instantly. Perfect for JWT tokens, API testing, images, and data transmission — completely free and private.
Quick Examples
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.
Developers use Base64 for JWT tokens, image encoding, API authentication, email attachments, and transmitting binary data over text-based protocols like HTTP.
How It Works
Enter Text
Type or paste your text/Base64 string
Choose Action
Click Encode or Decode
Get Result
Copy the converted output
Common Uses for Base64
🔐 JWT Tokens
JSON Web Tokens use Base64 encoding for their header and payload sections
🖼️ Image Embedding
Embed images directly in HTML/CSS using Base64 data URIs
📧 Email Attachments
MIME encoding for email attachments uses Base64
🔑 API Authentication
Basic authentication uses Base64 to encode username:password
Frequently Asked Questions
What is Base64 used for?
Base64 is used for JWT tokens, embedding images in HTML/CSS, email attachments, API authentication, and transmitting binary data over text-based protocols.
Is Base64 encryption?
No, Base64 is encoding, not encryption. It doesn't provide security — it only converts data to a different format.
Does this tool support Unicode?
Yes! Our tool properly handles Unicode/UTF-8 characters including emojis, special symbols, and non-Latin alphabets.
Are my files uploaded to a server?
No, all encoding and decoding happens locally in your browser. Your data never leaves your device.
Can I encode images or files?
This version handles text. For images or files, you'll need a file-to-Base64 converter.
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Ready to Encode or Decode?
Start converting now — it's free, fast, and completely private.