Does Base64 increase file size?

Yes. Base64 encoding increases data size by approximately 33%. It is best used for small images like icons and logos.

A data URI includes the MIME type and Base64 data in a single string that browsers can render as an image, like: data:image/png;base64,...

Image to Base64 Online Free

Convert any image to a Base64-encoded string or data URI for embedding directly in HTML, CSS, or JSON. The conversion happens in your browser with no server upload required.

Open Image to Base64

How It Works

Select or drop your image file
The tool instantly converts it to a Base64 string
Copy the raw Base64 or the full data URI
Paste directly into your HTML, CSS, or code

Common Use Cases

Embedding small images directly in HTML to reduce HTTP requests
Including icons in CSS as data URIs
Storing image data in JSON configuration files
Sending image data through text-based APIs
Creating self-contained HTML email templates

Frequently Asked Questions

Does Base64 increase file size?: Yes. Base64 encoding increases data size by approximately 33%. It is best used for small images like icons and logos.
What is a data URI?: A data URI includes the MIME type and Base64 data in a single string that browsers can render as an image, like: data:image/png;base64,...