Base64 to Image Converter
Convert images to Base64 and back.
Drop an image here or click to select
PNG, JPG, WebP, GIF, SVG
How to Use
Upload an image to convert it to a Base64-encoded data URI string, ready to embed directly in HTML or CSS. Alternatively, paste a Base64 data URI to decode it back into a viewable and downloadable image. The tool displays the encoded string length and the original image dimensions.
Common Use Cases
- Embedding small icons and logos directly in HTML to reduce HTTP requests
- Including images in JSON payloads or API responses as Base64 strings
- Decoding Base64 images found in email HTML sources or API responses
- Generating data URIs for CSS background-image properties in single-file components
Frequently Asked Questions
When should I use Base64 images instead of regular image files?
Base64 embedding is best for very small images (under 5-10 KB) like icons or simple graphics. For larger images, regular files with proper caching are more efficient because Base64 encoding increases size by about 33%.
What is a data URI?
A data URI is a URL scheme (data:) that embeds file content inline. For images, it looks like: data:image/png;base64,iVBORw0KGgo... This lets you include the image directly in HTML or CSS without a separate file.
Does Base64 encoding increase file size?
Yes. Base64 encoding increases the data size by approximately 33% because it encodes every 3 bytes of binary data as 4 ASCII characters. This overhead makes it inefficient for large images.