What is a Base64 data URI?

A data URI embeds file content directly in HTML/CSS as a text string, eliminating the need for a separate HTTP request. Format: data:image/png;base64,...

When should I use Base64 images?

For small images (icons, tiny thumbnails) to reduce HTTP requests. For larger images, regular files are more efficient since Base64 adds ~33% to the file size.

Is my image sent to a server?

No. Conversion uses the browser's FileReader API.

Image to Base64

Convert images to Base64 encoded strings and data URIs. Free online tool.

Click to select an image

Supports JPG, PNG, WebP, GIF, SVG

Frequently asked questions

Image to Base64 Converter — Free Online

Convert any image to a Base64 encoded string or data URI. Embed images directly in HTML, CSS, or JSON without separate file hosting.

Data URI output

Get a ready-to-use data:image/... URI for HTML or CSS.

Raw Base64

Also provides the raw Base64 string without the data URI prefix.

Client-side

Uses FileReader — your image never leaves your browser.