Usually not. Base64 increases size and can't be cached separately, so it's best reserved for small icons and inline graphics.
Yes. Image to Base64 is completely free with no sign-up, no watermarks and no usage limits.
No. Image to Base64 runs entirely in your browser, so your data never leaves your device.
Only your device's available memory — there are no server-side limits because nothing is uploaded.
Encode any image as a Base64 data URI you can paste into CSS or HTML.