Base64 Encode

Convert text or binary files into Base64, the encoding used to embed data safely in JSON, data URLs, HTTP headers, and email. UTF-8 characters and emoji encode correctly, and you can switch to the URL-safe alphabet when the output must live inside a URL. Files are read and encoded locally, so nothing is ever uploaded.

• Encode plain text or drag-and-drop files of any type
• Correct UTF-8 handling for accented characters, symbols, and emoji
• URL-safe mode using - and _ instead of + and /, with optional padding removal
• Generate ready-to-paste data: URLs for images and small assets
• Live output that updates as you type, plus one-click copy
• Byte and character counts for both input and encoded output

1. 1

   Enter your input

   Type or paste text, or drop a file into the tool. Binary files such as images are read as bytes and encoded directly.

2. 2

   Choose the alphabet

   Use standard Base64 for most cases, or switch to URL-safe mode when the result will be placed in a URL or filename.

3. 3

   Copy the encoded output

   The Base64 string updates instantly. Copy it, or copy it wrapped as a data: URL for direct use in HTML or CSS.

• Embedding small images or fonts inline as data: URLs
• Encoding binary payloads so they can travel inside JSON or XML
• Building HTTP Basic Authorization header values
• Storing binary blobs in text-only systems and config files
• Preparing attachments for MIME email bodies