Developer Tools
Base64 encoder and decoder
Encode Unicode text to Base64 or decode UTF-8 Base64 locally.
JavaScript is required to run the interactive tool. Open the tool separately if it does not load in the frame.
How to use it
Choose Encode or Decode, enter text and press Run.
Example
The UTF-8 text café encodes to Y2Fmw6k=.
Frequently asked question
Does Base64 protect secrets?
No. Anyone can decode it; do not use Base64 as encryption.
Limits and privacy
Input is limited to 2 million characters. Decoded bytes must form valid UTF-8 text. Base64 is encoding, not encryption.
Tool input is processed in a separate browser environment without advertising or analytics scripts. This page does not upload it to the service.