✦ Free · No Upload · Browser-Based

Image to Base64 — Free Online Converter

Convert any image to a Base64 data URL for embedding in HTML, CSS, or JSON. Copy or download as .txt.

✓ 100% Free✓ No file uploads🔒 Private⚡ Instant
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Drop your image here

All image formats supported

Add an image to get started

What is Base64 Image Encoding?

Base64 encodes binary image data as a text string, producing a "data URL" like data:image/jpeg;base64,/9j/4AAQ.... This lets you embed images directly into HTML, CSS, or JSON without a separate file — useful for email templates, icon embedding, and offline web pages.

1

Upload your image

Drop any image file. Smaller images produce shorter Base64 strings.

2

Convert

The image is rendered on Canvas and encoded as a Base64 data URL.

3

Copy or download

Click Copy to clipboard or Download as .txt — ready to paste into your code.

How to use Base64 in HTML

<img src="data:image/png;base64,YOUR_BASE64_STRING">

How to use Base64 in CSS

background-image: url('data:image/png;base64,YOUR_BASE64_STRING');

Base64 encoding increases file size by about 33%. A 100KB image produces a ~133KB Base64 string. For large images, hosting as a separate file is more efficient.

Convert Image to Base64 Online Free

Base64 encoding turns an image into a text string that can be embedded directly into HTML, CSS, or code. ImageZen4u generates Base64 in your browser and provides ready-to-paste HTML and CSS snippets.

Common uses and tips

Developers use Base64-encoded images to embed small images directly in HTML or CSS, eliminating a separate file request and speeding up page loads for icons and small graphics. It is also useful for embedding images in emails, storing images in databases, or including them in JSON data. The tool gives you the raw Base64 string plus ready-made HTML img tag and CSS background snippets you can copy with one click.