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GeekFormat

Base64 Encoder

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Free online Base64 encoder to convert text to Base64 instantly. Supports URL-safe encoding and MIME line wrapping. Perfect for API parameters, HTTP headers, and development testing.

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Use Cases

  • Encode text for API request parameters, JSON payloads, or WebSocket messages.
  • Generate Base64 credentials for HTTP Basic Authentication headers.
  • Encode configuration snippets, log data, or test strings for system transmission.
  • Preprocess text for inline frontend assets, Data URIs, or email MIME formatting.

Features

  • Instant & Secure Encoding: Convert plain text to Base64 locally in your browser with zero data upload.
  • Universal Character Support: Seamlessly handles English, Chinese, Unicode, emojis, and special characters with precise UTF-8 encoding.
  • Developer Ready: Perfect for generating API parameters, HTTP Basic Auth headers, JWT payloads, and config values.
  • Advanced Options: Supports URL-safe Base64 (for web parameters) and MIME line wrapping (for emails and legacy systems).

How to Use

  1. 1.Enter or paste the text you want to encode into the input box.
  2. 2.Select advanced options like URL-safe encoding or line wrapping if needed.
  3. 3.The tool instantly converts your text to a standard Base64 string.
  4. 4.One-click copy the encoded result for your API calls, config files, or debugging.

FAQ

How do I quickly encode text to Base64?

Simply type or paste your text into the input box. Our tool instantly converts it to a standard Base64 string, supporting English, Chinese, Unicode, and special characters.

What is the difference between standard and URL-safe Base64?

Standard Base64 uses '+' and '/' characters, which can cause issues in URLs. URL-safe Base64 replaces these with '-' and '_' to ensure the encoded string can be safely used in web parameters, filenames, and API paths.

Is Base64 encoding the same as encryption?

No. Base64 is an encoding scheme, not encryption. It is designed to make binary data transmittable over text-based protocols. Anyone with the Base64 string can decode it back to the original. Never use Base64 to protect sensitive data — use real encryption (like AES) instead.

Why does Base64 output sometimes include line breaks?

Some systems (like email MIME standards) require Base64 strings to be wrapped at a specific line length (usually 76 characters). Our tool allows you to enable or disable this line wrapping based on your specific use case.