Image to Base64 Converter

Convert From Image URL

Upload Local Image

Image to Base64 Converter – Complete Guide

What is an Image to Base64 Converter?

An Image to Base64 Converter converts image files like JPG, PNG, GIF or WebP into a Base64 encoded string.

Base64 encoding converts binary data into ASCII text so images can be embedded directly inside HTML, CSS or JSON.

Example Base64 Image:

data:image/jpeg;base64,/9j/4AAQSkZJRgABAQAAAQABAAD...

Instead of loading an external image file, the image data is stored directly inside the code.

How This Tool Works

This tool converts images using the JavaScript Fetch API and FileReader API.

1. URL Conversion

  1. The browser fetches the image using fetch()
  2. The image is downloaded as a Blob object
  3. The Blob is converted to Base64 using FileReader
  4. The Base64 string is generated

Process Flow:

Image URL
↓
Fetch API
↓
Blob Object
↓
FileReader.readAsDataURL()
↓
Base64 Output

2. Local Image Upload

  1. The browser reads the file using FileReader
  2. The file is converted into Base64
  3. The Base64 string is displayed instantly
Upload Image
↓
FileReader API
↓
Base64 Conversion
↓
Output Display

All processing happens inside the browser, so images are never uploaded to any server.

Why Use Base64 Images?

Embed Images in HTML

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

Use Images in CSS

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

Email Templates

Embedding images ensures they display even when email clients block external images.

API or JSON Usage

{
 "profileImage": "data:image/png;base64,iVBORw0KGgoAAAANSUhEUg..."
}

Benefits of Using This Tool

When Should You Use Base64 Images?

When NOT to Use Base64

Base64 should not be used for large images.

Best practice: Use Base64 for small images under 10KB.

Supported Image Types

Format Supported
JPG Yes
PNG Yes
GIF Yes
WebP Yes
SVG Yes

Frequently Asked Questions

Is this tool free?

Yes. The converter is completely free.

Are images uploaded to a server?

No. All processing happens inside the browser.

Why does some URL fail?

Some websites block cross-origin requests (CORS).

Does Base64 reduce size?

No. It increases file size by around 33%.

Maximum image size?

Most browsers support images up to 20–50MB.

Common Use Cases