Base64変換

Web MCP対応

Encode

Text → Base64

0 characters0 Base64 chars
0 characters

Decode

Base64 → Text

0 characters
0 characters

About Base64 Encoding

What is Base64?

A binary-to-text encoding scheme that represents binary data in ASCII string format, commonly used for encoding data in email, URLs, or HTTP headers.

URL Safe Mode

When enabled, uses - and _ instead of + and / to make the output safe for URLs and filenames.

Your data stays yours

100% local
Everything runs in your browser
Zero uploads
Files are never sent to a server
No sign-up
Free to use, no account needed

Base64 String Converter FAQ

Answers to the most common questions about using this tool.

What is Base64 encoding used for?

Base64 encodes binary data into ASCII text, commonly used for embedding images in HTML/CSS, transmitting data in URLs, and representing binary data in JSON.

Is this tool free to use?

Yes — every ConvTop tool is 100% free, with no sign-up, no limits and no watermark.

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