Base64 Encoder and Decoder
Encode UTF-8 text to Base64 or decode Base64 locally.
How to use this tool
- Choose encode or decode, enter text, then process it.
- Review the live result and use Copy result when you need to share it.
How the transformation works
TextEncoder and TextDecoder preserve Unicode through the byte conversion. Processing runs entirely in this browser. The page does not upload, persist, execute or remotely inspect the supplied content.
Processing rules
TextEncoder and TextDecoder preserve Unicode through the byte conversion. Processing runs entirely in this browser. The page does not upload, persist, execute or remotely inspect the supplied content.
Step-by-step transformation
- Choose encode or decode, enter text, then process it.
- TextEncoder and TextDecoder preserve Unicode through the byte conversion. Processing runs entirely in this browser. The page does not upload, persist, execute or remotely inspect the supplied content.
- Check the displayed result, then copy it if needed.
Worked example
A string containing an em dash and shamrock survives an encode/decode round trip.
Risk guidance
Frequently asked questions
Does this tool send my inputs anywhere?
No. The interactive calculation runs in your browser and this site does not submit tool inputs to a backend.
How should I use the result?
Check that the entered units and values match your situation, especially around dates, breaks, and rounding.
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