Base64 Encoder

Encode plain text to Base64 instantly. Supports UTF-8, ASCII, Unicode, emoji, and file uploads. 100% client-side.

Last Updated: August 2026
100% Client-Side — Your data never leaves your device

Why this tool is safe

Your data never leaves your device — everything runs in your browser.

No server uploads. Other tools send your files to their servers. Ours don't.
Zero tracking of content. We never see, store, or log anything you convert.
Works offline. Once loaded, the tool works without an internet connection.
No account required. Instantly use all tools completely free without signing up.

What is Base64 Encoding?

Base64 encoding is a widely used method for converting binary data into a string of readable ASCII characters. It translates 8-bit binary data into a 6-bit format, meaning every 3 bytes of data are represented by 4 Base64 characters.

Our Base64 Encoder allows you to safely transform plain text into a Base64 encoded string. This process ensures that your text can be transmitted without data corruption across systems that only support text-based formats.

Common Use Cases

  • Embedding small files (like images) directly into HTML or CSS files.
  • Encoding credentials for Basic Access Authentication in HTTP headers.
  • Sending complex binary data or special characters over email (MIME).
  • Storing complex objects as simple strings in databases or JSON.

Frequently Asked Questions

Search below or browse through our most commonly asked questions.

Type or paste your text or upload a text file into the input area. The tool will instantly convert your text to a standard Base64 encoded string using UTF-8 or your selected character set.
Yes, absolutely. All encoding is performed locally in your browser using JavaScript. No text is ever uploaded to any server or saved.
Yes! With UTF-8 charset mode selected by default, all international characters, accents, and emoji are properly encoded without corruption.

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