Other / Browser calculator

Base64 Encoder / Decoder

Base64 Encoder / Decoder works from the inputs you provide and returns base64. Use the calculation panel to explore a scenario, then check the formula and limitations before applying the result.

Your inputs

Your results

Enter your values and calculate to see the result.

Formula and calculation method

Encode UTF-8 bytes into Base64, or decode Base64 bytes into UTF-8 text.

Base64 is encoding, not encryption.

How to use base64 encoder / decoder

  1. Set Text or Base64. The example below uses Hello, world!.
  2. Set Operation by choosing the option that matches your calculation.
  3. Select Calculate to update the result. Reset restores the illustrated inputs. Copy, print or download your own result if you need a record.

Worked example

Example inputs
Text or Base64
Hello, world!
Operation
Encode UTF-8
Base64
SGVsbG8sIHdvcmxkIQ==

Factors affecting your result

Base64 is encoding, not encryption.

Changing text or base64 changes the scenario being evaluated. Adjust one input at a time when comparing results, keep a copy of the assumptions, and compare values using the same unit and period. A precise arithmetic result does not make an uncertain assumption precise.

Frequently asked questions

How does the base64 encoder / decoder work?

Encode UTF-8 bytes into Base64, or decode Base64 bytes into UTF-8 text.

What inputs does Base64 Encoder / Decoder need?

Enter text or base64, operation. Choose values that correspond to the same situation and measurement convention.

How should I interpret the base64 encoder / decoder result?

Base64 is encoding, not encryption.

Are my base64 encoder / decoder inputs uploaded?

No. The calculation runs in this browser. Favorites, recent tool names, theme and formatting preferences may be saved locally, but calculation inputs are not sent to a calculation server or stored by this website. Shared links do not include entered values.

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