How to use base64 encoder
- Paste text into the editor. Inputs are limited to one million characters.
- Choose an operation where available, then run the tool.
- Review the result, copy it or save a text file.
A simple example
Hello becomes SGVsbG8=. Unicode characters use UTF-8 bytes.
What to keep in mind
Text mode only. Invalid Base64 and invalid UTF-8 are rejected. Base64 is encoding, not encryption.
Good questions. Clear answers.
Does my text leave the device?
No. This tool processes text in your browser and does not retain it.
Can I undo a change?
Your original input stays in the input editor. The result appears separately.