Base64 encode and decode

Encode UTF-8 text as Base64 or decode Base64 back to text. Convert Unicode text locally and copy or download the result.

Free · No sign-up · Files stay on your device

Features

  • Encode text using the standard Base64 alphabet.
  • Decode Base64 into UTF-8 text.
  • Support Unicode text, including Chinese characters.

How to use this tool

  1. Paste plain text or a Base64 string.
  2. Choose Encode or Decode and run the tool.
  3. Copy or download the converted text.

Good to know

This tool is free without sign-up, with unlimited processing and exports within the displayed input limits.

  • This tool handles text, not arbitrary binary files. Base64 is an encoding, not encryption.

Privacy and local processing

This tool processes your input in your browser. Source files and text are not uploaded to a FormatOwl processing server. Advanced-tool access and trial balances are checked online using tool IDs, file types, sizes and page counts. Free tools do not require account authorization. Save the results you need before leaving or refreshing the page.

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