Image to Base64 Converter | Data URI Encoder
Convert image files into Base64 strings, raw encoded output, HTML image tags, and CSS background snippets.
Select or Drag Image
Convert Images to Base64
Upload an image and generate raw Base64, a data URI, an HTML image tag, or a CSS background value for inline embedding in prototypes, emails, small assets, or quick code tests.
When Base64 Images Help
Base64 can reduce separate file requests for tiny icons or temporary embeds, but it makes HTML and CSS heavier. For large photos, regular image files are usually better.
Check Size Before Embedding
Copy the encoded output only after checking file size and format. Very large Base64 strings can slow pages, clutter code, and exceed limits in email clients or CMS fields.
About This Tool
Image to Base64 Converter encodes an image file as a Base64 string that can be embedded directly in HTML, CSS, or JavaScript. This eliminates an HTTP request for the image at the cost of a larger inline size.
When to Use It
Use this when embedding a small icon in a CSS file using a data URI, when creating an HTML email that must include inline images, or when storing an image as a string in a database or API response.
How to Use
- Upload the image file.
- Click Convert to generate the Base64 string.
- Copy the data URI prefixed with data:image/... for use in HTML or CSS.
- Alternatively copy the raw Base64 string for JavaScript or API use.
Frequently Asked Questions
When should I use Base64 images instead of file references?
Use Base64 for very small images like icons under 5 KB where the HTTP request overhead outweighs the size increase. For larger images a file reference is almost always more efficient.
Does Base64 encoding increase file size?
Yes. Base64 encoding increases data size by approximately 33 percent compared to the binary file.
Can I embed a Base64 image in CSS?
Yes. Use it as a background-image value with the data URI format: background-image: url('data:image/png;base64,...')