Question 1

What is the use of converting images to Base64?

Accepted Answer

Base64 encodes images into plain text, which can be directly embedded in HTML, CSS, or Markdown, eliminating separate image requests. Commonly used for small icons, email signatures, single-file pages, etc. This tool also generates Data URI, CSS background, HTML img, and Markdown code snippets for direct copying.

Question 2

Why does the size increase after encoding?

Accepted Answer

Base64 uses 4 characters to represent 3 bytes, increasing data size by about 33%. Therefore, it is suitable for embedding small images; embedding larger images significantly increases file size and slows down loading, so it is recommended to use regular image link references.

Question 3

Will the image be uploaded to the server?

Accepted Answer

No. Encoding and decoding are done locally in your browser, neither the image nor the Base64 text will be uploaded or recorded, and it can be used offline.

Base64 Image Encoding

FAQ