Question 1

What is a Base64 data URI?

Accepted Answer

A data URI embeds file content directly in a string using Base64 encoding. It looks like data:image/png;base64,iVBOR... and can be used in CSS background-image, HTML img src, or JSON payloads without needing a separate file request.

Question 2

How does Base64 affect file size?

Accepted Answer

Base64 encoding increases data size by approximately 33%. A 100 KB image becomes roughly 133 KB as a Base64 string. It is best suited for small images (icons, thumbnails) where eliminating an HTTP request outweighs the size increase.

Question 3

Which image formats are supported?

Accepted Answer

PNG, JPG, WebP, GIF, and BMP are all supported. The tool reads the file as-is and produces a data URI with the correct MIME type, so the encoded string preserves the original format.

Image to Base64

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