Base64 Encoder & Decoder Online — Free Tool

Securely encode plain text into Base64 format, or decode Base64 strings back to their original readable state.

Input

Output

Privacy note: All processing happens entirely in your browser. No data is sent to our servers.

About this tool

Base64 Encoder & Decoder is a fast, browser-based developer utility. Securely encode plain text into Base64 format, or decode Base64 strings back to their original readable state. To use it, paste or upload your input in the tool above, choose any options (like formatting style, separators, or output type), and copy or download the result. Because it runs in your browser, it’s ideal for quick edits, previews, and conversions without installing extra software. Common use cases include cleaning up data before sharing, converting formats for a spreadsheet or API, validating content before deployment, and generating outputs you can paste directly into your codebase. If you handle sensitive data, prefer tools that run locally in your browser—this helps reduce the risk of uploading private content to a server.

How to use

Enter or upload your input in the tool panel above.
Adjust any options if provided.
Copy or download the output.

This page is available at /tools/base64-encoder-decoder.

Related keywords

base64 encoderbase64 decoderencode base64decode base64

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FAQ

What is Base64 Encoder & Decoder?

Base64 Encoder & Decoder is an online tool that helps you securely encode plain text into base64 format, or decode base64 strings back to their original readable state.

How do I use the Base64 Encoder & Decoder?

Add your input in the tool panel, adjust options if available, then copy or download the output.

Is this tool free?

Yes—this tool is free to use.

Does it run locally in the browser?

Most tools are designed to run in your browser. If a tool uploads files to a server, it should say so in the UI.