What is Image Base64 Encode?

A tool that converts image files into Base64 text format. Converted image data can be embedded directly into HTML or CSS, eliminating the need for external file references.

Useful when you want to display small icons or logos without HTTP requests, or when sending and receiving images as JSON instead of binary data via APIs. All processing happens in your browser, and images are never sent to any server.

How to Use

1. Click "Select File" button or drag and drop images
2. Encoding is performed automatically
3. Select the desired format (Raw, DataURI, HTML, CSS)
4. Copy to clipboard using the copy button

You can convert up to 20 images at once. Large images may take time to process.

Use Cases

🚀 Reduce HTTP Requests

Embed small icons or logos directly into HTML or CSS to reduce the number of server requests. This effectively improves page loading speed.

📡 Image Data Exchange via API

Use when you want to exchange images as JSON format instead of binary data in REST APIs. Images can be treated as text, allowing them to be included and transmitted within JSON.

💾 Offline Environment Usage

Since external file references are not required, you can create self-contained HTML content. Useful for email distribution and offline document creation.

Output Formats

Base64 Data (Raw)

Pure Base64 string without Data URI declaration. Use in APIs or custom implementations.

iVBORw0KGgoAAAANSUhEUgAAABAAAAAQCAYAAAAf8/9hAAAA...

Base64 Data (with DataURI Declaration)

Data URI format that browsers can directly interpret. Starts with data: and includes MIME type and encoding method.

data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAQCAYAAAAf8/9hAAAA...

HTML img tag

Outputs as an HTML img tag that you can paste directly into web pages.

<img src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAQCAYAAAAf8/9hAAAA..." alt="Base64 Encoded Image">

CSS Background Image

Outputs as a CSS background-image property for use in CSS files or style attributes.

background-image: url('data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAQCAYAAAAf8/9hAAAA...');

Image Data Details

Below the encoding results, you'll see a preview of the converted image and detailed information.

• Image Name: Original file name
• Last Modified: File's last update time
• Dimensions: Image resolution (pixels)
• File Size: Original size and Base64 converted size

Important Notes

• Base64 encoding increases file size by approximately 33%
• Large images may impact performance, so use with small to medium-sized images is recommended
• Extremely large Base64 strings may not be processable due to browser limitations