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Encoding & Security · Free online tool

Base64 Encoder & Decoder

Encode readable text into Base64 or decode Base64 strings locally.

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Ready to use Processes locally in your browser
Encoded / decoded result
No upload is required for these text tools.

How to use Base64 Encoder & Decoder

Switch between Encode and Decode to work with UTF-8 text. Base64 is an encoding, not encryption.

  1. Type or paste your input into the editor.
  2. Adjust available options, then choose Encode Base64.
  3. Review the result and copy or download it if useful.

Who is this tool for?

Students, developers, designers and anyone who works with encoding & security can use this tool to quickly test concepts without installing a full development environment.

Privacy and safety

Processing for this tool happens inside your browser, and CodingPremise does not receive the text you enter through a server-side processing endpoint. Your browser may still contact our hosting service to load this page. Avoid pasting passwords, private API credentials, or other sensitive information into websites you do not control.