Base64 Image Encoder
Upload any image file and instantly get its Base64-encoded data: URL, ready to embed directly in HTML, CSS, or JSON. The tool shows the original file size, the encoded string length, and a preview of the image. One-click copy puts the full data: URL on your clipboard.
Data URLs are useful for embedding small images directly in HTML or CSS to eliminate an extra HTTP request, for including images in JSON API responses, for generating self-contained HTML email templates, or for quick prototyping when you don't want to set up an image server.
All processing happens locally using the browser's FileReader API. Your images are never uploaded to any server.
By The Paper Room Editorial Team — Developer Tools
Frequently asked questions
What image formats are supported?▼
Any image format your browser supports — PNG, JPEG, GIF, WebP, SVG, BMP, ICO, and AVIF. The data: URL includes the correct MIME type automatically.
How much larger is the Base64 version?▼
Base64 encoding increases the size by approximately 33% — a 100 KB image becomes roughly 133 KB of Base64 text. The tool shows both sizes so you can decide whether inline embedding is worth the tradeoff.
Is there a size limit?▼
There's no hard limit in the tool itself, but very large images (several megabytes) will produce very long strings that may slow down your editor or browser. Base64 embedding is best suited for small images — icons, logos, and decorative elements under 50-100 KB.