Question 1

What is Base64 image encoding?

Accepted Answer

Base64 image encoding converts binary image data into an ASCII text string. This allows images to be embedded directly in HTML, CSS, or JSON without requiring separate HTTP requests. The encoded string is about 33% larger than the original binary data, but eliminates the need for additional file downloads.

Question 2

When should I use Base64 images?

Accepted Answer

Base64 images are best for small icons, logos, and UI elements under 10KB. They reduce HTTP requests and can improve initial page load for small assets. Avoid Base64 for large images as the encoded size is ~33% larger than the original, and large Base64 strings cannot be cached separately by the browser.

Question 3

What image formats can be converted to Base64?

Accepted Answer

Any image format can be converted to Base64, including PNG, JPEG, GIF, SVG, WebP, ICO, and BMP. The resulting Base64 string includes the MIME type in the data URI prefix (e.g., data:image/png;base64,...), so the browser knows how to render it correctly.

Question 4

Does Base64 encoding affect image quality?

Accepted Answer

No, Base64 encoding is lossless. It is simply a different representation of the same binary data. The decoded image is identical to the original. However, if you compress the image before encoding (e.g., JPEG compression), that compression quality applies regardless of Base64 encoding.

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