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Base64 Encoder

Encode text to Base64 online. Fast, client-side encoding for data URIs, API payloads, and embedded assets.

About Base64 Encoder

Base64 encoding converts text data into an ASCII string format safe for transmission over text-based protocols. Use this tool to encode strings for data URIs, embed content in CSS or HTML, or prepare payloads for APIs. All processing happens locally in your browser.

How to Use Base64 Encoder

  1. Type or paste the text you want to encode.
  2. Click 'Encode to Base64' to transform the input.
  3. Copy the Base64 output to your clipboard.

Frequently Asked Questions

What is Base64 encoding used for?

Base64 is commonly used for encoding data in email attachments, embedding content in HTML/CSS, and transmitting data in URL parameters or JSON fields.

Is there a size limit?

The tool handles text up to several megabytes. Very large inputs may slow down your browser due to memory constraints.

Is this tool secure for sensitive data?

Base64 is not encryption—it is encoding. Anyone can decode it. Do not use Base64 to protect sensitive information.