Image to Base64 Converter — Free Online
Convert images to Base64 encoded strings online for free. Generate data URIs for embedding images directly in HTML, CSS, and JavaScript. No upload.
About Image to Base64
Converting images to Base64 data URIs allows you to embed images directly into HTML, CSS, and JavaScript without needing separate image files. This technique is useful for email templates where external image links are blocked, creating self-contained single-file HTML documents, performance optimisation for small icons, and progressive web apps. Our converter runs entirely in your browser — your image is never uploaded. Supports JPG, PNG, GIF, WEBP, SVG, and ICO files.
Frequently Asked Questions
How do I use the Base64 image in HTML?
Use it as the src attribute: img src=data:image/png;base64,[BASE64_STRING]
How do I use it in CSS?
In a CSS background: background-image: url(data:image/png;base64,[BASE64_STRING])
Will embedding images as Base64 make my page slower?
For small images like icons, Base64 can be faster. For large images, it increases HTML/CSS size.
Is my image uploaded to your servers?
No — conversion happens entirely in your browser using JavaScript FileReader API.
What image formats are supported?
JPG, PNG, GIF, WEBP, SVG, ICO, and BMP are all supported.