Base64 Decoder
Decode valid Base64 into Unicode text.
Your input is processed locally in your browser. It is not saved, logged, or sent with analytics.
0 chars
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Decoded text
Enter a value to begin.
What this calculator does
Validate and decode standard Base64 as UTF-8 text without sending the value anywhere.
Inputs and what they mean
- Base64
- — text value.
How to use it
- Paste or enter content in the editor.
- Adjust any options for the result you need.
- Copy or download the locally processed output.
Formula
Base64 characters are decoded to bytes, then interpreted as UTF-8 text.
Worked example
Decode a greeting
Decode SGVsbG8h to Hello!
Reading the result
The decoded text appears in the output box and can be copied straight out. Nothing you paste leaves your browser.
Limitations and assumptions
Results depend entirely on the figures you enter and are rounded for display. They are for general information and education, not professional advice.