Image to Base64 Converter

Convert any image to a Base64 data URL you can paste straight into HTML or CSS, with a ready-made background snippet and size comparison. Encoded locally, your image never leaves your browser.

How it works

A Base64 data URL encodes an image as text you can paste directly into HTML or CSS, so the picture loads without a separate file request. This is handy for tiny icons, email templates and single-file demos.

Base64 makes the data roughly 33% larger than the original file, so it is best for small images, large photos are usually better left as normal files.

Your image is read and encoded entirely in your browser, it is never uploaded anywhere.

What this does

An image-to-Base64 converter turns any image into a Base64 data URL you can paste straight into HTML or CSS, with a ready-made background snippet and size comparison.

How to use it

  1. Choose an image.
  2. Copy the data URL.
  3. Or copy the CSS background snippet.
  4. Check the size comparison.

Example

A 1 KB (1,024-byte) PNG icon becomes a data URL of about 1,390 characters, roughly 1.4 KB.

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Frequently asked questions

What is a Base64 data URL?

It encodes an image as a long text string you can embed directly in HTML or CSS, so the picture loads without a separate file request, handy for tiny icons and email templates.

Why is the encoded size larger?

Base64 represents binary data using text, which makes it roughly 33% bigger than the original file. It is best used for small images; large photos are better kept as normal files.

Is my image uploaded?

No. The file is read and encoded entirely in your browser using the FileReader API; nothing is sent to any server.