- Private: files never leave your device
- Free, no sign-up
- Fast, works offline once loaded
How to use Image to Base64 Converter
- Drop one or more images into the box.
- Choose the output: data URI, Base64 string, HTML img tag or CSS background.
- Press Copy, or download the result as a .txt file.
About this tool
Base64 turns an image into text so it can be embedded straight into HTML, CSS, JSON or emails without a separate file. This tool gives you the exact snippet to paste: a full data URI, the raw Base64 string, a ready-made img tag or a CSS background rule.
Base64 makes data about 33 percent larger, so use it only for small icons and images where saving an extra request matters. For anything big, link to a normal file instead.
Frequently asked questions
What is a Base64 image?
It is an image encoded as text. Browsers can display it directly from a data URI with no separate file.
When should I use Base64 images?
For small icons, email templates and single-file HTML pages. Avoid it for large photos because it increases size by about a third.
How do I use the result in HTML?
Choose the HTML img tag format and paste it into your page, or use the data URI as the src attribute.
Is Image to Base64 Converter really free?
Yes. You can use Image to Base64 Converter as often as you like with no sign-up, no watermark and no daily limit.
Are my images uploaded to a server?
No. Image to Base64 Converter runs entirely in your web browser, so your files stay on your own device and are never sent to DEWANARO or anyone else.