Why would I convert an image to Base64?

You would convert an image to Base64 to embed it directly in HTML or CSS without needing a separate image file, to include images in JSON API responses, to embed images in email HTML, or to reduce HTTP requests for small icons and logos in web applications.

What image formats does this tool support?

This tool supports all common image formats including PNG, JPG/JPEG, GIF, WebP, SVG, BMP, ICO, and TIFF. Any image file your browser can read can be converted to Base64.

Is there a file size limit for image conversion?

There is no enforced file size limit. However Base64 encoding increases file size by approximately 33%, so very large images will produce very large Base64 strings. For web use, it is recommended to only embed images smaller than 10KB as Base64 to avoid performance issues.

Is my image uploaded to a server?

No. All conversion happens 100% inside your browser using JavaScript's FileReader API. Your image is never uploaded to any server, never stored, and never seen by anyone else. It is completely private.

A data URI (Uniform Resource Identifier) is a way to include data inline in web documents. It starts with 'data:' followed by the MIME type and the Base64-encoded data. For example: data:image/png;base64,iVBORw0KGgo... This can be used directly as an image src in HTML.

Free Image to Base64 Converter Online — Encode Images Instantly

🖼️

Drop your image here or click to browse

Supports PNG, JPG, GIF, WebP, SVG, BMP, ICO & more

PNG JPG GIF WebP SVG BMP ICO

Converting image...

⚠️ This image is large. For web embedding, consider optimizing images >10KB before using Base64 to avoid performance issues.

✅ Conversion Complete

📌 Data URI — Use directly as an src attribute in an HTML <img> tag or as a CSS url() value.

📏 Original: —

📤 Base64: —

📈 Increase: —

🔤 Chars: —

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💻 How to Use Base64 Images in Code

Once you have your Base64 string, here are ready-to-use code snippets for every scenario. Replace BASE64_STRING with your actual output:

🌐 HTML — Inline Image

<img
  src="data:image/png;base64,BASE64_STRING"
  alt="My Image"
  width="200"
  height="auto"
/>

🎨 CSS — Background Image

.my-element {
  background-image: url("data:image/png;base64,BASE64_STRING");
  background-size: cover;
  background-repeat: no-repeat;
}

🟨 JavaScript — Create Image Element

const img = new Image();
img.src = "data:image/png;base64,BASE64_STRING";
img.alt = "My Image";
document.body.appendChild(img);

📋 JSON — API Payload

{
  "filename": "image.png",
  "mimeType": "image/png",
  "data": "BASE64_STRING"
}

⚛️ React / JSX

const MyImage = () => (
  <img
    src={`data:image/png;base64,BASE64_STRING`}
    alt="My Image"
    style={{ width: '100%' }}
  />
);

📧 HTML Email — Inline Image

<!-- Use in HTML email templates -->
<img
  src="data:image/png;base64,BASE64_STRING"
  alt="Logo"
  width="150"
  style="display:block; max-width:150px;"
/>

📖 How to Use the Image to Base64 Converter

Drop or Select Your Image

Drag and drop any image file into the drop zone, or click it to open the file browser. You can select multiple images at once. Supports PNG, JPG, GIF, WebP, SVG, BMP, and more.

Conversion Happens Instantly

Your image is converted to Base64 immediately in your browser. No uploading, no waiting. The preview and all file metadata appear right away.

Choose Your Output Format

Select from 5 output formats using the tabs — Data URI (use as image src), Base64 (raw string), HTML img tag, CSS background, or Markdown.

Copy or Download

Click Copy Output to copy to clipboard or Download .txt to save the Base64 string as a text file. Use Test Preview to verify the Base64 renders correctly.

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❓ Frequently Asked Questions

What is Image to Base64 conversion? +

Image to Base64 conversion encodes a binary image file into a string of ASCII characters. This string can be embedded directly in HTML, CSS, or JSON — eliminating the need for a separate image file or an additional HTTP request to load the image.

Why would I embed an image as Base64? +

Common reasons to use Base64 images include:

• Reduce HTTP requests — Embed small icons directly in HTML/CSS
• HTML emails — Some email clients block external images; inline Base64 ensures the image always shows
• API responses — Pass image data in JSON without a separate file endpoint
• Offline apps — Bundle images directly in the app without external files
• Single-file HTML — Create fully self-contained HTML documents

What image formats are supported? +

This tool supports all image formats your browser can read, including PNG, JPG/JPEG, GIF, WebP, SVG, BMP, ICO, and TIFF. The MIME type is detected automatically and included in the data URI output.

Is there a maximum file size? +

There is no hard limit. However, Base64 encoding increases the file size by about 33%, so large images will produce very large strings. For web performance, only embed images smaller than 10KB as Base64. Larger images should be served as regular files from a CDN or web server.

Is my image uploaded to your servers? +

Absolutely not. All conversion is done entirely within your browser using the JavaScript FileReader API. Your image never leaves your device. It is never uploaded, never stored, and never seen by anyone. You can even disconnect from the internet and the tool will still work.

What is the difference between a Data URI and a Base64 string? +

A Base64 string is just the encoded image data characters (e.g. iVBORw0KGgo...).

A Data URI includes a header that tells the browser what type of data it is, followed by the Base64 string:
data:image/png;base64,iVBORw0KGgo...

Use the full Data URI when setting it as an src attribute or CSS url(). Use the raw Base64 string when storing data in databases or API payloads where the type is handled separately.

Free Image to Base64 Converter Online