Base64 Encoder/Decoder
Encode text to Base64 and decode Base64 strings instantly. Runs entirely in your browser.
The Base64 Encoder/Decoder is a fast, accurate Developer utility designed to encode text to base64 and decode base64 strings instantly. runs entirely in your browser. entirely in your browser with zero server data storage.
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Systems & Security Engineers • Applied Cryptography & High-Performance Web Tools
How to Use Base64 Encoder/Decoder
Enter your text
Type or paste the text you want to encode in the input field. The tool supports Unicode characters including emojis.
Choose Encode or Decode
Select the Encode tab to convert plain text to Base64, or the Decode tab to convert Base64 back to plain text.
Copy the result
Your result appears instantly. Click the Copy button to copy it to your clipboard, or use the Clear button to start over.
Practical Examples & Conversions
Hello World
SGVsbG8gV29ybGQ=
Frequently Asked Questions (PAA)
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Authoritative Standards & Citations
Calculations and algorithms on this page are implemented and verified in strict accordance with the following official technical specifications:
RFC 7519: JSON Web Token (JWT)
Standardized compact, URL-safe means of representing claims to be transferred between two parties.
Web Cryptography API Specification
Standard JavaScript API for performing basic cryptographic operations in web applications.
RFC 4122: A Universally Unique IDentifier (UUID) URN Namespace
Definition of uniform format and generation algorithms for UUIDs.