Converter
Image to Base64 Data URI
Input
Drag & Drop Image or Click
Output
Waiting
Frequently Asked Questions
Why convert an image to Base64?
Base64-encoded images can be embedded directly in HTML, CSS, or JSON as a data URI, eliminating the need for a separate HTTP request. This is useful for small icons, email templates, and offline-capable web apps.
Does converting an image to Base64 change its quality?
No. Base64 encoding is lossless — it is just a different way to represent the same binary data. The image quality and file content are identical; only the representation changes.
Why does Base64 make the file about 33% larger?
Base64 encodes every 3 bytes of binary data into 4 ASCII characters. This overhead of 4/3 × original size explains the ~33% size increase. For large images, a direct file reference via URL is more efficient than Base64 data URIs.