Method
Encoding converts Unicode text to UTF-8 bytes and maps each 24-bit group to four Base64 characters; decoding reverses the process.
Everyday worksheet
Unicode Base64 Encoder and Decoder
Encode UTF-8 text to Base64 or decode Base64 bytes back to valid Unicode entirely in the browser.
The calculation runs locally. Results include the intermediate values, unit conversions and assumptions needed to audit the answer.
Method, assumptions and practical use
How the Unicode Base64 Encoder and Decoder works
Encoding converts Unicode text to UTF-8 bytes and maps each 24-bit group to four Base64 characters; decoding reverses the process. Inputs stay in this browser, and the result table exposes conversions and assumptions for independent checking.
Interpret the result
Base64 is a reversible binary-to-text representation, not encryption or compression.
Check the assumptions
Decoded bytes must form valid UTF-8 text for this text-focused page; arbitrary binary should be handled as a file.
Local calculation
Everything runs in this browser. Inputs are not sent to an external calculator.
Rounding
Displayed values may be rounded for readability while calculations use full floating-point precision unless the tool explicitly uses exact integers.
Scope
Decoded bytes must form valid UTF-8 text for this text-focused page; arbitrary binary should be handled as a file.
Simple by design
Three steps to a clearer number.
Enter your details
Use realistic values in each field. You can change them anytime.
Calculate instantly
The formula runs locally, so there is no account or waiting time.
Use the result
Treat the answer as a practical estimate for your next decision.