BYTETOOLS

Image to Base64 Converter

Convert an image to a Base64 data URL online. Get copy-ready HTML img tags and CSS background-image snippets. Free, instant and fully private.

Drop an image to convert to Base64PNG, JPG, WebP, GIF, SVG and more

What is the Image to Base64 Converter?

The Image to Base64 Converter encodes any image file into a Base64 data URL — a text string that embeds the entire image inline.

  • Converts any image format to a Base64 data URL
  • Ready-to-paste HTML img tag and CSS background-image snippets
  • One-click copy of the full string, even for large images
  • Shows original file size and encoded size
  • Works with PNG, JPG, WebP, GIF, SVG, AVIF and more
  • 100% local encoding — files never leave your browser

How to use the Image to Base64 Converter

  1. 1

    Drop an image into the upload area or click to browse.

  2. 2

    The Base64 data URL is generated instantly (long strings are shortened on screen but copied in full).

  3. 3

    Click Copy to grab the raw data URL, the img tag or the CSS snippet.

  4. 4

    Paste it straight into your HTML, CSS, email template or code.

About the Image to Base64 Converter

The Image to Base64 Converter encodes any image file into a Base64 data URL — a text string that embeds the entire image inline. Alongside the raw string you get ready-made snippets: an HTML img tag and a CSS background-image rule, each with its own copy button.

Developers embed Base64 images in HTML emails, inline small icons in CSS to avoid extra HTTP requests, seed test fixtures, or store images in JSON and databases where binary files aren't practical.

Encoding happens entirely in your browser with the FileReader API. The image is never uploaded, so converting proprietary graphics, unreleased designs and personal photos is completely safe.

Frequently asked questions

How do I convert an image to Base64?

Drop the image into this converter and the Base64 data URL appears instantly. Click Copy to grab the full string, or copy the pre-built HTML or CSS snippet if you're embedding it directly in a web page.

What is a Base64 data URL?

It's a text representation of a file in the form data:image/png;base64,iVBORw0..., where the binary image bytes are encoded as safe ASCII characters. Browsers decode it on the fly, letting you embed images inline without a separate file.

Does Base64 make my image bigger?

Yes, by roughly 33–37%, because every 3 bytes of binary become 4 text characters. That's why Base64 embedding is best for small assets like icons and logos under a few kilobytes, not large photos.

When should I use Base64 images instead of files?

Use Base64 for small icons inlined into CSS, images in HTML emails where linked files may be blocked, self-contained HTML documents and API payloads. For regular websites, separate image files cache better and load faster.

Is it safe to convert sensitive images here?

Yes. The conversion uses your browser's built-in FileReader — the image is read on your device and never transmitted to a server, logged or stored anywhere.

Guides for Image to Base64 Converter

Related tools