Base64 Image Encoder Online
Convert images to Base64 data URIs for embedding directly in HTML, CSS, or JSON. Supports all common image formats. Processing happens entirely in your browser.
Why encode images as Base64?
Base64-encoded images can be embedded directly in HTML (<img src="data:image/png;base64,...">) or CSS (background-image: url(data:...)). This eliminates an HTTP request, which can improve page load times for small images. Icons, logos, and small UI graphics are common candidates.
When not to use Base64 images
Base64 increases size by ~33% and prevents browser caching. For images larger than 5–10 KB, regular image files with proper caching are usually more efficient. Base64 is best for small icons, simple logos, and inline SVGs under 5 KB.
Frequently Asked Questions
What image formats can be encoded to Base64?
Any image format can be Base64-encoded: PNG, JPEG, GIF, SVG, WebP, BMP, ICO, and more. The format is preserved in the data URI MIME type.
Does Base64 encoding reduce image quality?
No. Base64 is a lossless encoding — the image data is preserved exactly. The only difference is the text representation and the ~33% size increase.