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Base64 Encoder

Encode any text or string to Base64 format instantly.

Options
Go to Decoder
Input Text or File
Or drop a file here to encode
Raw Base64
Data URI Format

data:text/plain;base64,...

How to use Base64 Encoder

  1. 1

    Input Data

    Type/paste text into the input box, or drag and drop a file into the area.

  2. 2

    Set Options

    Toggle URL-safe encoding (replaces + and /) or MIME line breaks (every 76 characters).

  3. 3

    View Results

    The Base64 string is generated instantly. You can also view the size increase percentage.

  4. 4

    Copy Output

    Copy the raw Base64 string, or copy it as a Data URI (useful for embedding images in HTML/CSS).

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Frequently Asked Questions

What is Base64 encoding?

Base64 converts binary data (like images or documents) into a printable ASCII string format. It's commonly used to embed files directly into HTML or CSS.

What is URL-safe Base64?

Standard Base64 uses the '+' and '/' characters, which have special meanings in URLs. URL-safe Base64 replaces them with '-' and '_' so the string can be safely passed in a web address.

Why did the file size increase?

Base64 encoding represents 3 bytes of data using 4 characters. This inherently increases the total data size by exactly 33.3%.

What is a Data URI?

A Data URI allows you to include data in-line in web pages as if they were external resources. For example, <img src='data:image/png;base64,...'>.

Is my data sent to a server?

No. Everything, including file encoding, happens entirely within your web browser. Your files never leave your computer.