Base64 Encoder / Decoder
Encode or decode Base64 strings directly in your browser with UTF-8 support.
Output
How to use this tool
Enter the required values in the labeled fields. Results update in your browser and are announced for assistive technologies. Use realistic measurements and verify important outcomes before acting on them.
Formula or logic
The tool uses browser-native Base64 functions with UTF-8 conversion around non-Latin characters.
Example calculation
Example: Hello world encodes to SGVsbG8gd29ybGQ=.
Frequently asked questions
Does it support Unicode?
Yes. UTF-8 conversion is applied.
What happens with invalid Base64?
An error message is shown.
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