Set up your input
Choose Encode or Decode and the standard or URL format, enter text, then convert. Base64 is not encryption.
Little helpers for test data
Base64 encoder / decoder
Encode or decode UTF-8 text, including Thai and emoji, with standard Base64 or Base64URL. Process text locally.
Results
Your results will appear here.
How to use
Review and adjust
Use the main button to see the result. Adjust your input and run it again. Processing stays in this browser.
Use the result
Copy the result into your test system. Where download buttons are shown, files are created from the current result in your browser. Inputs and outputs are not saved or uploaded.
Try these examples
Test input handling
Encode Thai text and emoji, then decode it to check UTF-8 handling.
Test presentation and integration
Use Base64URL when you need - and _ in place of + and /. Only UTF-8 text is supported, not arbitrary binary files.