About Base64 Encoder
Base64 Encoder/Decoder converts plain UTF-8 text into standard Base64 format and decodes Base64 encoded strings back to readable plaintext.
Key Capabilities & Features
Full UTF-8 support including emojis and special international characters
One-click mode toggle between Encode and Decode
Input/output swap button for quick testing
100% client-side privacy using TextEncoder Web APIs
How to Use Base64 Encoder
- 01
Select mode
Choose Encode or Decode mode.
- 02
Enter text
Type or paste plain text or Base64 string.
- 03
Copy converted result
Use the copy button to copy the output.
100% In-Browser Privacy Guarantee
All operations in Base64 Encoder run locally in your web browser using HTML5, Web Cryptography, and WebAssembly APIs. Your text, files, credentials, and code never leave your computer.
Frequently Asked Questions
What is Base64 encoding?
Base64 is a binary-to-text encoding scheme that represents binary data in an ASCII string format.
Is my data transmitted over the internet?
No. Base64 encoding and decoding executes 100% inside your browser.