When should I embed images as Base64?

Base64 embedding is best for small images (icons, logos under 5KB) where eliminating an HTTP request outweighs the size overhead. Base64 encoding increases file size by ~33%, so it is not recommended for large images or images used on multiple pages.

How do I use a Base64 image in CSS?

Use it as: background-image: url("data:image/png;base64,YOUR_BASE64_HERE"). This is especially useful for CSS that is inlined or for email templates where external image URLs are blocked.

How do I use it in an HTML img tag?

Set the src attribute to the full data URI: . The browser renders it just like a regular image URL.

Is my image uploaded to your server?

No. The entire encoding process happens in your browser using the FileReader API. Your image data never leaves your device.

🖼️

Base64 Image Encoder

Convert images to Base64 data URIs for use in HTML, CSS, and JavaScript. Supports JPEG, PNG, WebP, GIF, SVG. Free Base64 image encoder — no uploads to server.

🖼️

Click or drag an image here

PNG, JPG, GIF, SVG, WebP

About This Tool

Convert any image (JPEG, PNG, WebP, GIF, SVG) to a Base64-encoded data URI for embedding directly in HTML, CSS, or JavaScript — eliminating an extra HTTP request. Everything runs in your browser; your image is never uploaded.