Base64 text encoder / decoder
Base64 text encoder / decoder: use text or padded base64, operation. Review the formula, worked example and calculation steps.
Inputs
Use the units shown—
Enter your values and select Calculate.
Formula & explanation
UTF-8 bytes ↔ standard Base64 groups of 6 bits
Variables & units
- Text or padded Base64
- Text input
- Operation
- Select an option
Worked example
Hello encodes as SGVsbG8=.
Assumptions
Base64 is an encoding, not encryption. This tool handles UTF-8 text and standard padded Base64, not binary files or base64url. Input and output are not added to automatic history.
Formula version 1.0.0. JavaScript floating-point arithmetic applies. Results display up to 6 decimal places; stored values retain available precision. Use the units shown.
Calculated on your device. Automatic history is disabled for these inputs.