Ctrl K

Convert an image to Base64

Drop an image into the box and get its Base64 code straight away, as a data URI, an HTML <img> tag, CSS or plain Base64. Copy what you need with one click.

Drag your image here

Choose image

PNG, JPG, WebP, GIF, SVG or ICO · or paste with Ctrl+V

For src="…" or in JavaScript.

Paste this straight into your HTML.

As a background image.

Without a prefix, for example for an API.

How it works

  1. Choose your image

    Drop a file into the box or choose one on your device.

  2. Adjust the settings

    The preview changes as you drag. Hold the compare button to see your original.

  3. Download the result

    As PNG, JPG or WebP, at the same resolution as your original.

Four outputs

  • Data URI: data:image/png;base64,…, for a src="…" attribute or in JavaScript.
  • HTML: a ready-made <img> tag with the image embedded.
  • CSS: a background-image: url(…) declaration.
  • Base64 only: the code without a prefix, for example for an API that expects a Base64 string.

The image is converted exactly as it is: nothing is re-encoded, so there is no loss of quality. PNG, JPG, WebP, GIF, SVG, ICO, AVIF and BMP are supported.

When is it a good idea?

Embedding an image saves a request, which suits small images such as icons, logos and placeholders in HTML, CSS or e-mail. For anything bigger, a separate file is usually faster: Base64 is about a third larger than the file itself and can't be cached separately. The tool warns you when an image is over 100 KB. A tiny icon as a data URI can even serve as a favicon; see how to make a favicon.

Frequently asked questions

Is converting an image to Base64 free?

Yes. You can convert as many images as you like, with no account.

When should I use an image as Base64?

For small images such as icons and logos in HTML, CSS or e-mail. For large images a separate file is usually faster, because Base64 is about a third larger and isn't cached on its own.

Which formats can I convert?

PNG, JPG, WebP, GIF, SVG, ICO, AVIF and BMP. The file is converted as it is, without quality loss.

Is my image uploaded?

No. The conversion happens in your browser; your image never leaves your device.