How to use the Base64 Encoder / Decoder
- Paste your text into the input box. The sample is only a starting point.
- Choose the operation or settings that match your task.
- Select Run tool, then copy or download the result.
A practical example
Encode “Hello world” for a text-based payload.
Before you use the result
Base64 is encoding, not encryption. Decoding expects valid UTF-8.
Review the output before using it in published content, software or important decisions. This tool performs the transformation described above; it does not verify the meaning or correctness of your input.
Is this tool free?
Yes. This tool has no subscription, account requirement or paid API dependency. It uses your device’s processing resources.
Where is my input processed?
The calculation or transformation runs in your browser. Tool input is not sent to our server. Your browser still makes normal requests for the website files; see the privacy policy.
What if I get an error?
Check the format and range described above. Try a smaller input, use a current browser, and serve the site over HTTPS for cryptographic and clipboard features.