Image Base64 Converter

Convert between images and Base64 encoding, supports drag-and-drop and real-time preview

Upload Image

Drag image here, or click to select file

Supports JPG, PNG, GIF, WebP, SVG and more

What is Base64 Image Encoding?

Base64 is an encoding method that uses 64 printable characters to represent binary data. Base64 image encoding converts image binary data into an ASCII string, allowing images to be directly embedded in HTML, CSS, or JSON text formats.

Data URL format: data:image/[format];base64,[encoded data]

How to Use

Image to Base64

  1. Drag image to upload area, or click select file button
  2. Choose output format: include Data URL prefix or pure Base64
  3. Click "Copy Base64" button to copy result
  4. Paste the copied content where needed

Base64 to Image

  1. Paste Base64 string into input box
  2. Click "Convert to Image" button
  3. Preview conversion result, can download and save image

Usage Examples

Use in HTML

<img src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUg..." alt="image description">

Use in CSS

.background {
    background-image: url('data:image/png;base64,iVBORw0KGgoAAAANSUhEUg...');
}

Transmit in JSON API

{
    "image": "iVBORw0KGgoAAAANSUhEUgAAAAUA...",
    "format": "png"
}

FAQ

Q: Why convert images to Base64?

A: Base64 encoding can reduce HTTP requests, suitable for small icons, background images, etc. Images are directly embedded in code without additional file requests.

Q: Does Base64 encoding make images larger?

A: Yes, Base64 encoding increases data size by about 33%. It's recommended to use Base64 only for small images (typically under 10KB).

Q: Are large images suitable for Base64?

A: Not recommended. Large images produce very long encoded strings, increasing HTML/CSS file size and affecting loading performance. Consider using image CDN or lazy loading instead.

Q: Will images be uploaded to server?

A: No. All conversions are done locally in your browser. Image data is never uploaded to any server, protecting your privacy.