Question 1

What is Base64 image encoding?

Accepted Answer

Base64 writes a binary file, such as a PNG, as plain text using 64 safe characters. Wrapped in a data URI (data:image/png;base64,…), the image can be placed directly inside HTML, CSS, JSON or an email without a separate image file.

Question 2

When should I use Base64 images?

Accepted Answer

They're handy for small icons, logos and placeholders of a few kilobytes, single-file HTML pages, and APIs that only accept text. Avoid them for photos: Base64 is about a third larger than the original file and can't be cached separately by the browser.

Question 3

How do I use a data URI in HTML or CSS?

Accepted Answer

Choose “HTML <img> tag” or “CSS background-image” as the output, copy the result and paste it into your code. A data URI has the form data:[file type];base64,[data], and works anywhere a normal image URL does.

Question 4

How do I convert Base64 back into an image?

Accepted Answer

Open the “Base64 to Image” tab and paste a full data URI or just the Base64 text; URL-safe Base64 and missing padding are accepted. The tool detects the file type from the decoded content, shows a preview and lets you download the file.

Question 5

Which image types are supported, and is it private?

Accepted Answer

PNG, JPG, GIF, WebP, SVG, ICO, BMP and AVIF. The conversion runs entirely in your browser, so your images and text are never uploaded.

Image to Base64 Converter

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