Base64 ↔ Image Converter

What is Base64 Image Conversion?

Base64 image conversion transforms binary image files into a text string composed of alphabets and numbers. This allows images to be embedded directly as "Data URIs" into HTML/CSS files, which can reduce the number of HTTP requests and speed up page rendering for small assets.

How to Use

• Image to Base64 (Encode): Drop an image file into the drop area, and a Base64 string will be generated instantly. The Data URI, which is ready to use in the format <img src="data:image/png;base64,...">, can also be copied with a single click.
• Base64 to Image (Decode): Paste a long Base64 string obtained from other systems into the text area. The original image will be previewed on the screen, and you can download it back as a normal image file.

Terminology

• Data URI: A URL scheme that allows creators to embed small files inline in documents. Defined as data:[<mediatype>][;base64],<data>.

Common Use Cases

• Embedding a tiny loading spinner GIF or SVG directly into your CSS bundle to prevent a flash of unstyled content.
• Debugging image data corruptions inside an API's JSON response payload.

Limitations / Notes

• Converting an image to Base64 typically increases its overall byte size by ~33%. It's strictly recommended only for tiny icons, not full photos.

Security

The conversion process from an image file to text, and the restoration process from text to an image, are completed entirely within the browser sandbox. The image data is never transmitted to an external server.