Question 1

What image formats are supported?

Accepted Answer

PNG, JPEG, GIF, SVG, and WebP files are supported.

Question 2

Is there a file size limit?

Accepted Answer

There is no hard limit, but very large images will produce very long Base64 strings. Files under 1 MB work best.

Question 3

Is my image uploaded to a server?

Accepted Answer

No. All conversion happens locally in your browser. Your image never leaves your device.

Question 4

What is a Base64 data URI?

Accepted Answer

A Base64 data URI is a string that encodes a file's binary data as Base64 text, prefixed with a MIME type declaration (e.g. data:image/png;base64,...). This string can be used directly in HTML src attributes and CSS url() values.

Question 5

When should I embed images as Base64?

Accepted Answer

Embed images as Base64 to eliminate extra HTTP requests for small icons or inline images in HTML emails, CSS stylesheets, or self-contained HTML files. Avoid it for large images as Base64 encoding is about 33% larger than the original binary.

Image to Base64

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